86791905 has 40 divisors (see below), whose sum is σ = 163785600. Its totient is φ = 43848864.

The previous prime is 86791883. The next prime is 86791933. The reversal of 86791905 is 50919768.

It is not a de Polignac number, because 86791905 - 2²⁵ = 53237473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 2056 + ... + 13334.

It is an arithmetic number, because the mean of its divisors is an integer number (4094640).

Almost surely, 2^86791905 is an apocalyptic number.

It is an amenable number.

86791905 is a deficient number, since it is larger than the sum of its proper divisors (76993695).

86791905 is a wasteful number, since it uses less digits than its factorization.

86791905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11315 (or 11306 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 86791905 is about 9316.2173117634. The cubic root of 86791905 is about 442.7511932017.

The spelling of 86791905 in words is "eighty-six million, seven hundred ninety-one thousand, nine hundred five".