87312553 has 2 divisors, whose sum is σ = 87312554. Its totient is φ = 87312552.

The previous prime is 87312551. The next prime is 87312557. The reversal of 87312553 is 35521378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 26347689 = 7808^2 + 5133^2 .

It is a cyclic number.

It is not a de Polignac number, because 87312553 - 2¹ = 87312551 is a prime.

It is a super-2 number, since 2×87312553² = 15246963822755618, which contains 22 as substring.

Together with 87312551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87312551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43656276 + 43656277.

It is an arithmetic number, because the mean of its divisors is an integer number (43656277).

Almost surely, 2^87312553 is an apocalyptic number.

It is an amenable number.

87312553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87312553 is an equidigital number, since it uses as much as digits as its factorization.

87312553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 87312553 is about 9344.1186315243. The cubic root of 87312553 is about 443.6347552874.

The spelling of 87312553 in words is "eighty-seven million, three hundred twelve thousand, five hundred fifty-three".