39122979 has 16 divisors (see below), whose sum is σ = 61071360. Its totient is φ = 21810240.

The previous prime is 39122939. The next prime is 39122981. The reversal of 39122979 is 97922193.

It is a happy number.

It is not a de Polignac number, because 39122979 - 2¹⁵ = 39090211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39122979.

It is not an unprimeable number, because it can be changed into a prime (39122929) 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, 21859 + ... + 23580.

It is an arithmetic number, because the mean of its divisors is an integer number (3816960).

Almost surely, 2^39122979 is an apocalyptic number.

39122979 is a deficient number, since it is larger than the sum of its proper divisors (21948381).

39122979 is a wasteful number, since it uses less digits than its factorization.

39122979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45490.

The product of its digits is 61236, while the sum is 42.

The square root of 39122979 is about 6254.8364487011. The cubic root of 39122979 is about 339.4772213940.

The spelling of 39122979 in words is "thirty-nine million, one hundred twenty-two thousand, nine hundred seventy-nine".