495964639 has 4 divisors (see below), whose sum is σ = 498482424. Its totient is φ = 493446856.

The previous prime is 495964631. The next prime is 495964669. The reversal of 495964639 is 936469594.

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 495964639 - 2³ = 495964631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 495964639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495964631) 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, 1258597 + ... + 1258990.

It is an arithmetic number, because the mean of its divisors is an integer number (124620606).

Almost surely, 2^495964639 is an apocalyptic number.

495964639 is a deficient number, since it is larger than the sum of its proper divisors (2517785).

495964639 is a wasteful number, since it uses less digits than its factorization.

495964639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517784.

The product of its digits is 6298560, while the sum is 55.

The square root of 495964639 is about 22270.2635592846. The cubic root of 495964639 is about 791.5595103324.

The spelling of 495964639 in words is "four hundred ninety-five million, nine hundred sixty-four thousand, six hundred thirty-nine".