87390577 has 4 divisors (see below), whose sum is σ = 89422960. Its totient is φ = 85358196.

The previous prime is 87390571. The next prime is 87390619. The reversal of 87390577 is 77509378.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87390577 - 2⁷ = 87390449 is a prime.

It is a super-2 number, since 2×87390577² = 15274225896785858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87390571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016127 + ... + 1016212.

It is an arithmetic number, because the mean of its divisors is an integer number (22355740).

Almost surely, 2^87390577 is an apocalyptic number.

It is an amenable number.

87390577 is a deficient number, since it is larger than the sum of its proper divisors (2032383).

87390577 is a wasteful number, since it uses less digits than its factorization.

87390577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032382.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 87390577 is about 9348.2927318308. The cubic root of 87390577 is about 443.7668624948.

The spelling of 87390577 in words is "eighty-seven million, three hundred ninety thousand, five hundred seventy-seven".