39424979 has 4 divisors (see below), whose sum is σ = 43009080. Its totient is φ = 35840880.

The previous prime is 39424969. The next prime is 39425003. The reversal of 39424979 is 97942493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97942493 = 11 ⋅8903863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39424979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39424919) 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, 1792034 + ... + 1792055.

It is an arithmetic number, because the mean of its divisors is an integer number (10752270).

Almost surely, 2^39424979 is an apocalyptic number.

39424979 is a deficient number, since it is larger than the sum of its proper divisors (3584101).

39424979 is a wasteful number, since it uses less digits than its factorization.

39424979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584100.

The product of its digits is 489888, while the sum is 47.

The square root of 39424979 is about 6278.9313581214. The cubic root of 39424979 is about 340.3484864073.

The spelling of 39424979 in words is "thirty-nine million, four hundred twenty-four thousand, nine hundred seventy-nine".