99931039 has 4 divisors (see below), whose sum is σ = 107618056. Its totient is φ = 92244024.

The previous prime is 99931037. The next prime is 99931057. The reversal of 99931039 is 93013999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93013999 = 13 ⋅7154923.

It is a cyclic number.

It is not a de Polignac number, because 99931039 - 2¹ = 99931037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99930986 and 99931004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99931031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3843489 + ... + 3843514.

It is an arithmetic number, because the mean of its divisors is an integer number (26904514).

Almost surely, 2^99931039 is an apocalyptic number.

99931039 is a deficient number, since it is larger than the sum of its proper divisors (7687017).

99931039 is a wasteful number, since it uses less digits than its factorization.

99931039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687016.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 99931039 is about 9996.5513553425. The cubic root of 99931039 is about 464.0521626231.

The spelling of 99931039 in words is "ninety-nine million, nine hundred thirty-one thousand, thirty-nine".