39913947 has 48 divisors (see below), whose sum is σ = 63835200. Its totient is φ = 23950080.

The previous prime is 39913931. The next prime is 39913961. The reversal of 39913947 is 74931993.

It is not a de Polignac number, because 39913947 - 2⁴ = 39913931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39913967) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366129 + ... + 366237.

It is an arithmetic number, because the mean of its divisors is an integer number (1329900).

Almost surely, 2^39913947 is an apocalyptic number.

39913947 is a deficient number, since it is larger than the sum of its proper divisors (23921253).

39913947 is a wasteful number, since it uses less digits than its factorization.

39913947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 225 counting only the distinct ones).

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

The square root of 39913947 is about 6317.7485704957. The cubic root of 39913947 is about 341.7497656555.

The spelling of 39913947 in words is "thirty-nine million, nine hundred thirteen thousand, nine hundred forty-seven".