113920309 has 2 divisors, whose sum is σ = 113920310. Its totient is φ = 113920308.

The previous prime is 113920243. The next prime is 113920321. The reversal of 113920309 is 903029311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113742225 + 178084 = 10665^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 113920309 - 2¹⁵ = 113887541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113900309) 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, 56960154 + 56960155.

It is an arithmetic number, because the mean of its divisors is an integer number (56960155).

Almost surely, 2^113920309 is an apocalyptic number.

It is an amenable number.

113920309 is a deficient number, since it is larger than the sum of its proper divisors (1).

113920309 is an equidigital number, since it uses as much as digits as its factorization.

113920309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 113920309 is about 10673.3457266220. The cubic root of 113920309 is about 484.7677479411.

The spelling of 113920309 in words is "one hundred thirteen million, nine hundred twenty thousand, three hundred nine".