87546391 has 2 divisors, whose sum is σ = 87546392. Its totient is φ = 87546390.

The previous prime is 87546373. The next prime is 87546397. The reversal of 87546391 is 19364578.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87546391 - 2⁵ = 87546359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87546397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43773195 + 43773196.

It is an arithmetic number, because the mean of its divisors is an integer number (43773196).

Almost surely, 2^87546391 is an apocalyptic number.

87546391 is a deficient number, since it is larger than the sum of its proper divisors (1).

87546391 is an equidigital number, since it uses as much as digits as its factorization.

87546391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 87546391 is about 9356.6228416026. The cubic root of 87546391 is about 444.0304455897.

The spelling of 87546391 in words is "eighty-seven million, five hundred forty-six thousand, three hundred ninety-one".