8464639 has 2 divisors, whose sum is σ = 8464640. Its totient is φ = 8464638.

The previous prime is 8464627. The next prime is 8464649. The reversal of 8464639 is 9364648.

8464639 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8464639 - 2²³ = 76031 is a prime.

It is a super-2 number, since 2×8464639² = 143300226800642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8464649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4232319 + 4232320.

It is an arithmetic number, because the mean of its divisors is an integer number (4232320).

Almost surely, 2^8464639 is an apocalyptic number.

8464639 is a deficient number, since it is larger than the sum of its proper divisors (1).

8464639 is an equidigital number, since it uses as much as digits as its factorization.

8464639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 8464639 is about 2909.4052656858. The cubic root of 8464639 is about 203.7993589878.

Subtracting 8464639 from its reverse (9364648), we obtain a palindrome (900009).

It can be divided in two parts, 846463 and 9, that multiplied together give a palindrome (7618167).

The spelling of 8464639 in words is "eight million, four hundred sixty-four thousand, six hundred thirty-nine".