87718901 has 2 divisors, whose sum is σ = 87718902. Its totient is φ = 87718900.

The previous prime is 87718859. The next prime is 87718903. The reversal of 87718901 is 10981778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61606801 + 26112100 = 7849^2 + 5110^2 .

It is a cyclic number.

It is not a de Polignac number, because 87718901 - 2⁶ = 87718837 is a prime.

Together with 87718903, 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 (87718903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43859450 + 43859451.

It is an arithmetic number, because the mean of its divisors is an integer number (43859451).

Almost surely, 2^87718901 is an apocalyptic number.

It is an amenable number.

87718901 is a deficient number, since it is larger than the sum of its proper divisors (1).

87718901 is an equidigital number, since it uses as much as digits as its factorization.

87718901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 87718901 is about 9365.8369086804. The cubic root of 87718901 is about 444.3219079527.

The spelling of 87718901 in words is "eighty-seven million, seven hundred eighteen thousand, nine hundred one".