39974993 has 16 divisors (see below), whose sum is σ = 43538880. Its totient is φ = 36578304.

The previous prime is 39974983. The next prime is 39974999. The reversal of 39974993 is 39947993.

It is a cyclic number.

It is not a de Polignac number, because 39974993 - 2⁶ = 39974929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39974999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92105 + ... + 92537.

It is an arithmetic number, because the mean of its divisors is an integer number (2721180).

Almost surely, 2^39974993 is an apocalyptic number.

It is an amenable number.

39974993 is a deficient number, since it is larger than the sum of its proper divisors (3563887).

39974993 is a wasteful number, since it uses less digits than its factorization.

39974993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its digits is 1653372, while the sum is 53.

The square root of 39974993 is about 6322.5780343148. The cubic root of 39974993 is about 341.9239055308.

Subtracting from 39974993 its reverse (39947993), we obtain a cube (27000 = 30³).

The spelling of 39974993 in words is "thirty-nine million, nine hundred seventy-four thousand, nine hundred ninety-three".