1374551681 has 2 divisors, whose sum is σ = 1374551682. Its totient is φ = 1374551680.

The previous prime is 1374551627. The next prime is 1374551743. The reversal of 1374551681 is 1861554731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1373073025 + 1478656 = 37055^2 + 1216^2 .

It is an emirp because it is prime and its reverse (1861554731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1374551681 - 2⁶ = 1374551617 is a prime.

It is a super-2 number, since 2×1374551681² = 3778784647479851522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1374551611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687275840 + 687275841.

It is an arithmetic number, because the mean of its divisors is an integer number (687275841).

Almost surely, 2^1374551681 is an apocalyptic number.

It is an amenable number.

1374551681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1374551681 is an equidigital number, since it uses as much as digits as its factorization.

1374551681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 1374551681 is about 37074.9468104811. The cubic root of 1374551681 is about 1111.8691772952.

The spelling of 1374551681 in words is "one billion, three hundred seventy-four million, five hundred fifty-one thousand, six hundred eighty-one".