39397879 has 4 divisors (see below), whose sum is σ = 39443184. Its totient is φ = 39352576.

The previous prime is 39397877. The next prime is 39397889. The reversal of 39397879 is 97879393.

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 39397879 - 2¹ = 39397877 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 (39397871) 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, 21322 + ... + 23095.

It is an arithmetic number, because the mean of its divisors is an integer number (9860796).

Almost surely, 2^39397879 is an apocalyptic number.

39397879 is a deficient number, since it is larger than the sum of its proper divisors (45305).

39397879 is an equidigital number, since it uses as much as digits as its factorization.

39397879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45304.

The product of its digits is 2571912, while the sum is 55.

The square root of 39397879 is about 6276.7729766178. The cubic root of 39397879 is about 340.2704854515.

It can be divided in two parts, 3939 and 7879, that multiplied together give a triangular number (31035381 = T₇₈₇₈).

The spelling of 39397879 in words is "thirty-nine million, three hundred ninety-seven thousand, eight hundred seventy-nine".