99139671 has 12 divisors (see below), whose sum is σ = 143631072. Its totient is φ = 65894976.

The previous prime is 99139657. The next prime is 99139693. The reversal of 99139671 is 17693199.

It is not a de Polignac number, because 99139671 - 2⁷ = 99139543 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99139571) 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 in 11 ways as a sum of consecutive naturals, for example, 13311 + ... + 19376.

It is an arithmetic number, because the mean of its divisors is an integer number (11969256).

Almost surely, 2^99139671 is an apocalyptic number.

99139671 is a deficient number, since it is larger than the sum of its proper divisors (44491401).

99139671 is a wasteful number, since it uses less digits than its factorization.

99139671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33030 (or 33027 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 99139671 is about 9956.8906291071. The cubic root of 99139671 is about 462.8239499108.

The spelling of 99139671 in words is "ninety-nine million, one hundred thirty-nine thousand, six hundred seventy-one".