39700979 has 4 divisors (see below), whose sum is σ = 40094160. Its totient is φ = 39307800.

The previous prime is 39700949. The next prime is 39700993. The reversal of 39700979 is 97900793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97900793 = 251 ⋅390043.

It is a cyclic number.

It is not a de Polignac number, because 39700979 - 2⁸ = 39700723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39700909) 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, 196439 + ... + 196640.

It is an arithmetic number, because the mean of its divisors is an integer number (10023540).

Almost surely, 2^39700979 is an apocalyptic number.

39700979 is a deficient number, since it is larger than the sum of its proper divisors (393181).

39700979 is a wasteful number, since it uses less digits than its factorization.

39700979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393180.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 39700979 is about 6300.8712889568. The cubic root of 39700979 is about 341.1408590672.

The spelling of 39700979 in words is "thirty-nine million, seven hundred thousand, nine hundred seventy-nine".