113651621 has 2 divisors, whose sum is σ = 113651622. Its totient is φ = 113651620.

The previous prime is 113651581. The next prime is 113651627. The reversal of 113651621 is 126156311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112572100 + 1079521 = 10610^2 + 1039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113651621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113651627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56825810 + 56825811.

It is an arithmetic number, because the mean of its divisors is an integer number (56825811).

Almost surely, 2^113651621 is an apocalyptic number.

It is an amenable number.

113651621 is a deficient number, since it is larger than the sum of its proper divisors (1).

113651621 is an equidigital number, since it uses as much as digits as its factorization.

113651621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 113651621 is about 10660.7514275496. The cubic root of 113651621 is about 484.3863298134.

The spelling of 113651621 in words is "one hundred thirteen million, six hundred fifty-one thousand, six hundred twenty-one".