87290477 has 4 divisors (see below), whose sum is σ = 87325920. Its totient is φ = 87255036.

The previous prime is 87290459. The next prime is 87290479. The reversal of 87290477 is 77409278.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77409278 = 2 ⋅38704639.

It is a cyclic number.

It is not a de Polignac number, because 87290477 - 2²² = 83096173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87290479) 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, 13727 + ... + 19052.

It is an arithmetic number, because the mean of its divisors is an integer number (21831480).

Almost surely, 2^87290477 is an apocalyptic number.

It is an amenable number.

87290477 is a deficient number, since it is larger than the sum of its proper divisors (35443).

87290477 is a wasteful number, since it uses less digits than its factorization.

87290477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35442.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 87290477 is about 9342.9372790360. The cubic root of 87290477 is about 443.5973627780.

The spelling of 87290477 in words is "eighty-seven million, two hundred ninety thousand, four hundred seventy-seven".