99913157 has 2 divisors, whose sum is σ = 99913158. Its totient is φ = 99913156.

The previous prime is 99913027. The next prime is 99913169. The reversal of 99913157 is 75131999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88529281 + 11383876 = 9409^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 99913157 - 2¹⁴ = 99896773 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 (99910157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49956578 + 49956579.

It is an arithmetic number, because the mean of its divisors is an integer number (49956579).

Almost surely, 2^99913157 is an apocalyptic number.

It is an amenable number.

99913157 is a deficient number, since it is larger than the sum of its proper divisors (1).

99913157 is an equidigital number, since it uses as much as digits as its factorization.

99913157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 44.

The square root of 99913157 is about 9995.6569068771. The cubic root of 99913157 is about 464.0244812811.

The spelling of 99913157 in words is "ninety-nine million, nine hundred thirteen thousand, one hundred fifty-seven".