86457839 has 4 divisors (see below), whose sum is σ = 93108456. Its totient is φ = 79807224.

The previous prime is 86457817. The next prime is 86457841. The reversal of 86457839 is 93875468.

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 86457839 - 2²⁴ = 69680623 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 (86457139) 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, 3325289 + ... + 3325314.

It is an arithmetic number, because the mean of its divisors is an integer number (23277114).

Almost surely, 2^86457839 is an apocalyptic number.

86457839 is a deficient number, since it is larger than the sum of its proper divisors (6650617).

86457839 is a wasteful number, since it uses less digits than its factorization.

86457839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6650616.

The product of its digits is 1451520, while the sum is 50.

The square root of 86457839 is about 9298.2707532100. The cubic root of 86457839 is about 442.1824063034.

The spelling of 86457839 in words is "eighty-six million, four hundred fifty-seven thousand, eight hundred thirty-nine".