86623639 has 2 divisors, whose sum is σ = 86623640. Its totient is φ = 86623638.

The previous prime is 86623633. The next prime is 86623709. The reversal of 86623639 is 93632668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86623639 - 2⁹ = 86623127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86623595 and 86623604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86623633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43311819 + 43311820.

It is an arithmetic number, because the mean of its divisors is an integer number (43311820).

Almost surely, 2^86623639 is an apocalyptic number.

86623639 is a deficient number, since it is larger than the sum of its proper divisors (1).

86623639 is an equidigital number, since it uses as much as digits as its factorization.

86623639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The square root of 86623639 is about 9307.1821192024. The cubic root of 86623639 is about 442.4648832081.

The spelling of 86623639 in words is "eighty-six million, six hundred twenty-three thousand, six hundred thirty-nine".