86825639 has 4 divisors (see below), whose sum is σ = 88297320. Its totient is φ = 85353960.

The previous prime is 86825633. The next prime is 86825653. The reversal of 86825639 is 93652868.

It is a happy number.

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 86825639 - 2¹² = 86821543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86825593 and 86825602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86825633) 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, 735752 + ... + 735869.

It is an arithmetic number, because the mean of its divisors is an integer number (22074330).

Almost surely, 2^86825639 is an apocalyptic number.

86825639 is a deficient number, since it is larger than the sum of its proper divisors (1471681).

86825639 is a wasteful number, since it uses less digits than its factorization.

86825639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471680.

The product of its digits is 622080, while the sum is 47.

The square root of 86825639 is about 9318.0276346446. The cubic root of 86825639 is about 442.8085481439.

The spelling of 86825639 in words is "eighty-six million, eight hundred twenty-five thousand, six hundred thirty-nine".