87997001 has 2 divisors, whose sum is σ = 87997002. Its totient is φ = 87997000.

The previous prime is 87996977. The next prime is 87997009. The reversal of 87997001 is 10079978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86508601 + 1488400 = 9301^2 + 1220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87997001 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87997001.

It is not a weakly prime, because it can be changed into another prime (87997009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43998500 + 43998501.

It is an arithmetic number, because the mean of its divisors is an integer number (43998501).

Almost surely, 2^87997001 is an apocalyptic number.

It is an amenable number.

87997001 is a deficient number, since it is larger than the sum of its proper divisors (1).

87997001 is an equidigital number, since it uses as much as digits as its factorization.

87997001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 87997001 is about 9380.6716710479. The cubic root of 87997001 is about 444.7909652411.

The spelling of 87997001 in words is "eighty-seven million, nine hundred ninety-seven thousand, one".