39142879 has 4 divisors (see below), whose sum is σ = 39359320. Its totient is φ = 38926440.

The previous prime is 39142877. The next prime is 39142919. The reversal of 39142879 is 97824193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39142879 - 2¹ = 39142877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39142877) 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, 107949 + ... + 108310.

It is an arithmetic number, because the mean of its divisors is an integer number (9839830).

Almost surely, 2^39142879 is an apocalyptic number.

39142879 is a deficient number, since it is larger than the sum of its proper divisors (216441).

39142879 is a wasteful number, since it uses less digits than its factorization.

39142879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216440.

The product of its digits is 108864, while the sum is 43.

The square root of 39142879 is about 6256.4270154778. The cubic root of 39142879 is about 339.5347702804.

The spelling of 39142879 in words is "thirty-nine million, one hundred forty-two thousand, eight hundred seventy-nine".