39706513 has 36 divisors (see below), whose sum is σ = 52430196. Its totient is φ = 29937600.

The previous prime is 39706489. The next prime is 39706517. The reversal of 39706513 is 31560793.

It can be written as a sum of positive squares in 2 ways, for example, as 15421329 + 24285184 = 3927^2 + 4928^2 .

It is not a de Polignac number, because 39706513 - 2⁹ = 39706001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39706517) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 219283 + ... + 219463.

Almost surely, 2^39706513 is an apocalyptic number.

It is an amenable number.

39706513 is a deficient number, since it is larger than the sum of its proper divisors (12723683).

39706513 is a wasteful number, since it uses less digits than its factorization.

39706513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 39706513 is about 6301.3104192699. The cubic root of 39706513 is about 341.1567091029.

The spelling of 39706513 in words is "thirty-nine million, seven hundred six thousand, five hundred thirteen".