86905557 has 12 divisors (see below), whose sum is σ = 125611200. Its totient is φ = 57899688.

The previous prime is 86905519. The next prime is 86905571. The reversal of 86905557 is 75550968.

86905557 is a `hidden beast` number, since 8 + 6 + 90 + 5 + 557 = 666.

It is not a de Polignac number, because 86905557 - 2¹⁰ = 86904533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86905597) 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 11 ways as a sum of consecutive naturals, for example, 24694 + ... + 27992.

It is an arithmetic number, because the mean of its divisors is an integer number (10467600).

Almost surely, 2^86905557 is an apocalyptic number.

It is an amenable number.

86905557 is a deficient number, since it is larger than the sum of its proper divisors (38705643).

86905557 is a wasteful number, since it uses less digits than its factorization.

86905557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232 (or 6229 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 86905557 is about 9322.3150021870. The cubic root of 86905557 is about 442.9443664032.

The spelling of 86905557 in words is "eighty-six million, nine hundred five thousand, five hundred fifty-seven".