1947080513 has 18 divisors (see below), whose sum is σ = 2288875014. Its totient is φ = 1651367424.

The previous prime is 1947080507. The next prime is 1947080521. The reversal of 1947080513 is 3150807491.

It can be written as a sum of positive squares in 3 ways, for example, as 64128064 + 1882952449 = 8008^2 + 43393^2 .

It is not a de Polignac number, because 1947080513 - 2⁴ = 1947080497 is a prime.

It is a super-2 number, since 2×1947080513² = 7582245048208686338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1947080593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3283145 + ... + 3283737.

It is an arithmetic number, because the mean of its divisors is an integer number (127159723).

Almost surely, 2^1947080513 is an apocalyptic number.

It is an amenable number.

1947080513 is a deficient number, since it is larger than the sum of its proper divisors (341794501).

1947080513 is an frugal number, since it uses more digits than its factorization.

1947080513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1947080513 is about 44125.7352686615. The cubic root of 1947080513 is about 1248.7091769195.

The spelling of 1947080513 in words is "one billion, nine hundred forty-seven million, eighty thousand, five hundred thirteen".