39390377917 has 4 divisors (see below), whose sum is σ = 42971321376. Its totient is φ = 35809434460.

The previous prime is 39390377891. The next prime is 39390377927. The reversal of 39390377917 is 71977309393.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71977309393 = 11 ⋅6543391763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39390377917 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 (39390377927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790471713 + ... + 1790471734.

It is an arithmetic number, because the mean of its divisors is an integer number (10742830344).

Almost surely, 2^39390377917 is an apocalyptic number.

It is an amenable number.

39390377917 is a deficient number, since it is larger than the sum of its proper divisors (3580943459).

39390377917 is a wasteful number, since it uses less digits than its factorization.

39390377917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580943458.

The product of its (nonzero) digits is 6751269, while the sum is 58.

The spelling of 39390377917 in words is "thirty-nine billion, three hundred ninety million, three hundred seventy-seven thousand, nine hundred seventeen".