130916981 has 4 divisors (see below), whose sum is σ = 140987532. Its totient is φ = 120846432.

The previous prime is 130916917. The next prime is 130916987. The reversal of 130916981 is 189619031.

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 22944100 + 107972881 = 4790^2 + 10391^2 .

It is a cyclic number.

It is not a de Polignac number, because 130916981 - 2⁶ = 130916917 is a prime.

It is a super-2 number, since 2×130916981² = 34278511828308722, 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 (130916987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5035256 + ... + 5035281.

It is an arithmetic number, because the mean of its divisors is an integer number (35246883).

Almost surely, 2^130916981 is an apocalyptic number.

It is an amenable number.

130916981 is a deficient number, since it is larger than the sum of its proper divisors (10070551).

130916981 is a wasteful number, since it uses less digits than its factorization.

130916981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10070550.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 130916981 is about 11441.8958656335. The cubic root of 130916981 is about 507.7679993907.

The spelling of 130916981 in words is "one hundred thirty million, nine hundred sixteen thousand, nine hundred eighty-one".