87668797 has 2 divisors, whose sum is σ = 87668798. Its totient is φ = 87668796.

The previous prime is 87668767. The next prime is 87668807. The reversal of 87668797 is 79786678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69572281 + 18096516 = 8341^2 + 4254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87668797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87668767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43834398 + 43834399.

It is an arithmetic number, because the mean of its divisors is an integer number (43834399).

Almost surely, 2^87668797 is an apocalyptic number.

It is an amenable number.

87668797 is a deficient number, since it is larger than the sum of its proper divisors (1).

87668797 is an equidigital number, since it uses as much as digits as its factorization.

87668797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 58.

The square root of 87668797 is about 9363.1616989135. The cubic root of 87668797 is about 444.2372946990.

The spelling of 87668797 in words is "eighty-seven million, six hundred sixty-eight thousand, seven hundred ninety-seven".