39292993891 has 4 divisors (see below), whose sum is σ = 39309485152. Its totient is φ = 39276502632.

The previous prime is 39292993853. The next prime is 39292993913. The reversal of 39292993891 is 19839929293.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39292993891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39292993801) 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, 8242056 + ... + 8246821.

It is an arithmetic number, because the mean of its divisors is an integer number (9827371288).

Almost surely, 2^39292993891 is an apocalyptic number.

39292993891 is a deficient number, since it is larger than the sum of its proper divisors (16491261).

39292993891 is a wasteful number, since it uses less digits than its factorization.

39292993891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16491260.

The product of its digits is 17006112, while the sum is 64.

The spelling of 39292993891 in words is "thirty-nine billion, two hundred ninety-two million, nine hundred ninety-three thousand, eight hundred ninety-one".