39999959 has 8 divisors (see below), whose sum is σ = 42205440. Its totient is φ = 37804536.

The previous prime is 39999943. The next prime is 39999979. The reversal of 39999959 is 95999993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39999959 - 2⁴ = 39999943 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 (39999919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6524 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (5275680).

Almost surely, 2^39999959 is an apocalyptic number.

39999959 is a deficient number, since it is larger than the sum of its proper divisors (2205481).

39999959 is a wasteful number, since it uses less digits than its factorization.

39999959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029.

The product of its digits is 7971615, while the sum is 62.

The square root of 39999959 is about 6324.5520790013. The cubic root of 39999959 is about 341.9950724869.

It can be divided in two parts, 3999995 and 9, that added together give a palindrome (4000004).

The spelling of 39999959 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".