99387139 has 2 divisors, whose sum is σ = 99387140. Its totient is φ = 99387138.

The previous prime is 99387133. The next prime is 99387179. The reversal of 99387139 is 93178399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99387139 - 2⁵ = 99387107 is a prime.

It is a super-3 number, since 3×99387139³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99387092 and 99387101.

It is not a weakly prime, because it can be changed into another prime (99387133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49693569 + 49693570.

It is an arithmetic number, because the mean of its divisors is an integer number (49693570).

Almost surely, 2^99387139 is an apocalyptic number.

99387139 is a deficient number, since it is larger than the sum of its proper divisors (1).

99387139 is an equidigital number, since it uses as much as digits as its factorization.

99387139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 99387139 is about 9969.3098557523. The cubic root of 99387139 is about 463.2087233983.

The spelling of 99387139 in words is "ninety-nine million, three hundred eighty-seven thousand, one hundred thirty-nine".