99405331 has 2 divisors, whose sum is σ = 99405332. Its totient is φ = 99405330.

The previous prime is 99405277. The next prime is 99405337. The reversal of 99405331 is 13350499.

It is a strong prime.

It is an emirp because it is prime and its reverse (13350499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99405331 - 2¹⁵ = 99372563 is a prime.

It is a super-2 number, since 2×99405331² = 19762839662439122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99405337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49702665 + 49702666.

It is an arithmetic number, because the mean of its divisors is an integer number (49702666).

Almost surely, 2^99405331 is an apocalyptic number.

99405331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99405331 is an equidigital number, since it uses as much as digits as its factorization.

99405331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 99405331 is about 9970.2222141736. Note that the first 4 decimals coincide. The cubic root of 99405331 is about 463.2369838589.

The spelling of 99405331 in words is "ninety-nine million, four hundred five thousand, three hundred thirty-one".