1347550681 has 3 divisors (see below), whose sum is σ = 1347587391. Its totient is φ = 1347513972.

The previous prime is 1347550667. The next prime is 1347550709. The reversal of 1347550681 is 1860557431.

It is a happy number.

The square root of 1347550681 is 36709.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 602260681 + 745290000 = 24541^2 + 27300^2 .

It is not a de Polignac number, because 1347550681 - 2¹³ = 1347542489 is a prime.

It is a super-2 number, since 2×1347550681² = 3631785675727127522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1347550601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18355 + ... + 55063.

It is an arithmetic number, because the mean of its divisors is an integer number (449195797).

Almost surely, 2^1347550681 is an apocalyptic number.

1347550681 is the 36709-th square number.

1347550681 is the 18355-th centered octagonal number.

It is an amenable number.

1347550681 is a deficient number, since it is larger than the sum of its proper divisors (36710).

1347550681 is an frugal number, since it uses more digits than its factorization.

1347550681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73418 (or 36709 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The cubic root of 1347550681 is about 1104.5406473020.

The spelling of 1347550681 in words is "one billion, three hundred forty-seven million, five hundred fifty thousand, six hundred eighty-one".