99658939 has 2 divisors, whose sum is σ = 99658940. Its totient is φ = 99658938.

The previous prime is 99658927. The next prime is 99658961. The reversal of 99658939 is 93985699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99658939 - 2¹¹ = 99656891 is a prime.

It is not a weakly prime, because it can be changed into another prime (99658919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49829469 + 49829470.

It is an arithmetic number, because the mean of its divisors is an integer number (49829470).

Almost surely, 2^99658939 is an apocalyptic number.

99658939 is a deficient number, since it is larger than the sum of its proper divisors (1).

99658939 is an equidigital number, since it uses as much as digits as its factorization.

99658939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 58.

The square root of 99658939 is about 9982.9323848256. The cubic root of 99658939 is about 463.6305939992.

The spelling of 99658939 in words is "ninety-nine million, six hundred fifty-eight thousand, nine hundred thirty-nine".