87915319 has 2 divisors, whose sum is σ = 87915320. Its totient is φ = 87915318.

The previous prime is 87915301. The next prime is 87915389. The reversal of 87915319 is 91351978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87915319 - 2¹¹ = 87913271 is a prime.

It is a super-2 number, since 2×87915319² = 15458206629743522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87915389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43957659 + 43957660.

It is an arithmetic number, because the mean of its divisors is an integer number (43957660).

Almost surely, 2^87915319 is an apocalyptic number.

87915319 is a deficient number, since it is larger than the sum of its proper divisors (1).

87915319 is an equidigital number, since it uses as much as digits as its factorization.

87915319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 87915319 is about 9376.3169208384. The cubic root of 87915319 is about 444.6532989480.

The spelling of 87915319 in words is "eighty-seven million, nine hundred fifteen thousand, three hundred nineteen".