87630997 has 2 divisors, whose sum is σ = 87630998. Its totient is φ = 87630996.

The previous prime is 87630929. The next prime is 87631003. The reversal of 87630997 is 79903678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 749956 = 9321^2 + 866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87630997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87630997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87630497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43815498 + 43815499.

It is an arithmetic number, because the mean of its divisors is an integer number (43815499).

Almost surely, 2^87630997 is an apocalyptic number.

It is an amenable number.

87630997 is a deficient number, since it is larger than the sum of its proper divisors (1).

87630997 is an equidigital number, since it uses as much as digits as its factorization.

87630997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 87630997 is about 9361.1429323561. The cubic root of 87630997 is about 444.1734385179.

The spelling of 87630997 in words is "eighty-seven million, six hundred thirty thousand, nine hundred ninety-seven".