99920659 has 2 divisors, whose sum is σ = 99920660. Its totient is φ = 99920658.

The previous prime is 99920647. The next prime is 99920663. The reversal of 99920659 is 95602999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99920659 - 2⁹ = 99920147 is a prime.

It is not a weakly prime, because it can be changed into another prime (99920669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49960329 + 49960330.

It is an arithmetic number, because the mean of its divisors is an integer number (49960330).

Almost surely, 2^99920659 is an apocalyptic number.

99920659 is a deficient number, since it is larger than the sum of its proper divisors (1).

99920659 is an equidigital number, since it uses as much as digits as its factorization.

99920659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 99920659 is about 9996.0321628134. The cubic root of 99920659 is about 464.0360947818.

The spelling of 99920659 in words is "ninety-nine million, nine hundred twenty thousand, six hundred fifty-nine".