86790557 has 4 divisors (see below), whose sum is σ = 99189216. Its totient is φ = 74391900.

The previous prime is 86790553. The next prime is 86790577. The reversal of 86790557 is 75509768.

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 86790557 - 2² = 86790553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86790553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6199319 + ... + 6199332.

It is an arithmetic number, because the mean of its divisors is an integer number (24797304).

Almost surely, 2^86790557 is an apocalyptic number.

It is an amenable number.

86790557 is a deficient number, since it is larger than the sum of its proper divisors (12398659).

86790557 is a wasteful number, since it uses less digits than its factorization.

86790557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12398658.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 86790557 is about 9316.1449645226. The cubic root of 86790557 is about 442.7489010075.

The spelling of 86790557 in words is "eighty-six million, seven hundred ninety thousand, five hundred fifty-seven".