1313900981 has 8 divisors (see below), whose sum is σ = 1400405184. Its totient is φ = 1228420800.

The previous prime is 1313900957. The next prime is 1313900989. The reversal of 1313900981 is 1890093131.

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-1313900981 is a prime.

It is a super-2 number, since 2×1313900981² = 3452671575745524722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313900989) 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, 253355 + ... + 258488.

It is an arithmetic number, because the mean of its divisors is an integer number (175050648).

Almost surely, 2^1313900981 is an apocalyptic number.

It is an amenable number.

1313900981 is a deficient number, since it is larger than the sum of its proper divisors (86504203).

1313900981 is a wasteful number, since it uses less digits than its factorization.

1313900981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512011.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1313900981 is about 36247.7720832605. The cubic root of 1313900981 is about 1095.2692098173.

The spelling of 1313900981 in words is "one billion, three hundred thirteen million, nine hundred thousand, nine hundred eighty-one".