39479139 has 24 divisors (see below), whose sum is σ = 66246752. Its totient is φ = 22187520.

The previous prime is 39479137. The next prime is 39479171. The reversal of 39479139 is 93197493.

It is not a de Polignac number, because 39479139 - 2¹ = 39479137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39479094 and 39479103.

It is not an unprimeable number, because it can be changed into a prime (39479137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1294 + ... + 8979.

Almost surely, 2^39479139 is an apocalyptic number.

39479139 is a deficient number, since it is larger than the sum of its proper divisors (26767613).

39479139 is a wasteful number, since it uses less digits than its factorization.

39479139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347 (or 10344 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 39479139 is about 6283.2427137586. The cubic root of 39479139 is about 340.5042661526.

The spelling of 39479139 in words is "thirty-nine million, four hundred seventy-nine thousand, one hundred thirty-nine".