87996973 has 2 divisors, whose sum is σ = 87996974. Its totient is φ = 87996972.

The previous prime is 87996967. The next prime is 87996977. The reversal of 87996973 is 37969978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86155524 + 1841449 = 9282^2 + 1357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87996973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87996977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43998486 + 43998487.

It is an arithmetic number, because the mean of its divisors is an integer number (43998487).

Almost surely, 2^87996973 is an apocalyptic number.

It is an amenable number.

87996973 is a deficient number, since it is larger than the sum of its proper divisors (1).

87996973 is an equidigital number, since it uses as much as digits as its factorization.

87996973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 87996973 is about 9380.6701786173. The cubic root of 87996973 is about 444.7909180647.

The spelling of 87996973 in words is "eighty-seven million, nine hundred ninety-six thousand, nine hundred seventy-three".