86920139 has 4 divisors (see below), whose sum is σ = 86944800. Its totient is φ = 86895480.

The previous prime is 86920129. The next prime is 86920147. The reversal of 86920139 is 93102968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86920139 - 2¹² = 86916043 is a prime.

It is a super-2 number, since 2×86920139² = 15110221127558642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86920109) 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, 5939 + ... + 14460.

It is an arithmetic number, because the mean of its divisors is an integer number (21736200).

Almost surely, 2^86920139 is an apocalyptic number.

86920139 is a deficient number, since it is larger than the sum of its proper divisors (24661).

86920139 is a wasteful number, since it uses less digits than its factorization.

86920139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24660.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 86920139 is about 9323.0970712527. The cubic root of 86920139 is about 442.9691390942.

The spelling of 86920139 in words is "eighty-six million, nine hundred twenty thousand, one hundred thirty-nine".