130887355981 has 4 divisors (see below), whose sum is σ = 131217047452. Its totient is φ = 130557664512.

The previous prime is 130887355939. The next prime is 130887356003. The reversal of 130887355981 is 189553788031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38537616100 + 92349739881 = 196310^2 + 303891^2 .

It is a cyclic number.

It is not a de Polignac number, because 130887355981 - 2²⁵ = 130853801549 is a prime.

It is a super-2 number, since 2×130887355981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130887355381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164845140 + ... + 164845933.

It is an arithmetic number, because the mean of its divisors is an integer number (32804261863).

Almost surely, 2^130887355981 is an apocalyptic number.

It is an amenable number.

130887355981 is a deficient number, since it is larger than the sum of its proper divisors (329691471).

130887355981 is an equidigital number, since it uses as much as digits as its factorization.

130887355981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329691470.

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 130887355981 in words is "one hundred thirty billion, eight hundred eighty-seven million, three hundred fifty-five thousand, nine hundred eighty-one".