99555139 has 2 divisors, whose sum is σ = 99555140. Its totient is φ = 99555138.

The previous prime is 99555107. The next prime is 99555149. The reversal of 99555139 is 93155599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99555139 - 2⁵ = 99555107 is a prime.

It is a super-2 number, since 2×99555139² = 19822451402618642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99555149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49777569 + 49777570.

It is an arithmetic number, because the mean of its divisors is an integer number (49777570).

Almost surely, 2^99555139 is an apocalyptic number.

99555139 is a deficient number, since it is larger than the sum of its proper divisors (1).

99555139 is an equidigital number, since it uses as much as digits as its factorization.

99555139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 273375, while the sum is 46.

The square root of 99555139 is about 9977.7321571588. The cubic root of 99555139 is about 463.4695729074.

The spelling of 99555139 in words is "ninety-nine million, five hundred fifty-five thousand, one hundred thirty-nine".