1013957681 has 8 divisors (see below), whose sum is σ = 1127006784. Its totient is φ = 904387120.

The previous prime is 1013957627. The next prime is 1013957683. The reversal of 1013957681 is 1867593101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013957681 is a prime.

It is a super-2 number, since 2×1013957681² = 2056220357717795522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013957683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869021 + ... + 870186.

It is an arithmetic number, because the mean of its divisors is an integer number (140875848).

Almost surely, 2^1013957681 is an apocalyptic number.

1013957681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1013957681 is a deficient number, since it is larger than the sum of its proper divisors (113049103).

1013957681 is a wasteful number, since it uses less digits than its factorization.

1013957681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739271.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 1013957681 is about 31842.7021623480. The cubic root of 1013957681 is about 1004.6310803209.

The spelling of 1013957681 in words is "one billion, thirteen million, nine hundred fifty-seven thousand, six hundred eighty-one".