7900999973 has 4 divisors (see below), whose sum is σ = 7913326668. Its totient is φ = 7888673280.

The previous prime is 7900999913. The next prime is 7901000011. The reversal of 7900999973 is 3799990097.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6596201089 + 1304798884 = 81217^2 + 36122^2 .

It is a cyclic number.

It is not a de Polignac number, because 7900999973 - 2¹² = 7900995877 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 (7900999913) 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, 6162386 + ... + 6163667.

It is an arithmetic number, because the mean of its divisors is an integer number (1978331667).

Almost surely, 2^7900999973 is an apocalyptic number.

It is an amenable number.

7900999973 is a deficient number, since it is larger than the sum of its proper divisors (12326695).

7900999973 is a wasteful number, since it uses less digits than its factorization.

7900999973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12326694.

The product of its (nonzero) digits is 8680203, while the sum is 62.

The square root of 7900999973 is about 88887.5692827743. The cubic root of 7900999973 is about 1991.7157305685.

The spelling of 7900999973 in words is "seven billion, nine hundred million, nine hundred ninety-nine thousand, nine hundred seventy-three".