39920002961 has 4 divisors (see below), whose sum is σ = 41207745024. Its totient is φ = 38632260900.

The previous prime is 39920002949. The next prime is 39920002979. The reversal of 39920002961 is 16920002993.

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.

It is a cyclic number.

It is not a de Polignac number, because 39920002961 - 2¹⁰ = 39920001937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39920002261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643870985 + ... + 643871046.

It is an arithmetic number, because the mean of its divisors is an integer number (10301936256).

Almost surely, 2^39920002961 is an apocalyptic number.

39920002961 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39920002961 is a deficient number, since it is larger than the sum of its proper divisors (1287742063).

39920002961 is a wasteful number, since it uses less digits than its factorization.

39920002961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287742062.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 39920002961 in words is "thirty-nine billion, nine hundred twenty million, two thousand, nine hundred sixty-one".