113672921 has 2 divisors, whose sum is σ = 113672922. Its totient is φ = 113672920.

The previous prime is 113672891. The next prime is 113672959. The reversal of 113672921 is 129276311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105349696 + 8323225 = 10264^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 113672921 - 2²² = 109478617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (113672981) 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 as a sum of consecutive naturals, namely, 56836460 + 56836461.

It is an arithmetic number, because the mean of its divisors is an integer number (56836461).

Almost surely, 2^113672921 is an apocalyptic number.

It is an amenable number.

113672921 is a deficient number, since it is larger than the sum of its proper divisors (1).

113672921 is an equidigital number, since it uses as much as digits as its factorization.

113672921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 113672921 is about 10661.7503722419. The cubic root of 113672921 is about 484.4165883181.

The spelling of 113672921 in words is "one hundred thirteen million, six hundred seventy-two thousand, nine hundred twenty-one".