39942359 has 4 divisors (see below), whose sum is σ = 40024200. Its totient is φ = 39860520.

The previous prime is 39942347. The next prime is 39942361. The reversal of 39942359 is 95324993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95324993 = 7331 ⋅13003.

It is a cyclic number.

It is not a de Polignac number, because 39942359 - 2⁸ = 39942103 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 (39942379) 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, 40184 + ... + 41165.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050).

Almost surely, 2^39942359 is an apocalyptic number.

39942359 is a deficient number, since it is larger than the sum of its proper divisors (81841).

39942359 is an equidigital number, since it uses as much as digits as its factorization.

39942359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81840.

The product of its digits is 262440, while the sum is 44.

The square root of 39942359 is about 6319.9967563283. The cubic root of 39942359 is about 341.8308358250.

The spelling of 39942359 in words is "thirty-nine million, nine hundred forty-two thousand, three hundred fifty-nine".