87792917 has 2 divisors, whose sum is σ = 87792918. Its totient is φ = 87792916.

The previous prime is 87792911. The next prime is 87792919. The reversal of 87792917 is 71929778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78605956 + 9186961 = 8866^2 + 3031^2 .

It is a cyclic number.

It is not a de Polignac number, because 87792917 - 2²⁰ = 86744341 is a prime.

Together with 87792919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87792911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43896458 + 43896459.

It is an arithmetic number, because the mean of its divisors is an integer number (43896459).

Almost surely, 2^87792917 is an apocalyptic number.

It is an amenable number.

87792917 is a deficient number, since it is larger than the sum of its proper divisors (1).

87792917 is an equidigital number, since it uses as much as digits as its factorization.

87792917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 50.

The square root of 87792917 is about 9369.7874575681. The cubic root of 87792917 is about 444.4468437208.

The spelling of 87792917 in words is "eighty-seven million, seven hundred ninety-two thousand, nine hundred seventeen".