99155939 has 2 divisors, whose sum is σ = 99155940. Its totient is φ = 99155938.

The previous prime is 99155933. The next prime is 99155983. The reversal of 99155939 is 93955199.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99155939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99155933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49577969 + 49577970.

It is an arithmetic number, because the mean of its divisors is an integer number (49577970).

Almost surely, 2^99155939 is an apocalyptic number.

99155939 is a deficient number, since it is larger than the sum of its proper divisors (1).

99155939 is an equidigital number, since it uses as much as digits as its factorization.

99155939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 492075, while the sum is 50.

The square root of 99155939 is about 9957.7075172953. The cubic root of 99155939 is about 462.8492637203.

The spelling of 99155939 in words is "ninety-nine million, one hundred fifty-five thousand, nine hundred thirty-nine".