495942639 has 4 divisors (see below), whose sum is σ = 661256856. Its totient is φ = 330628424.

The previous prime is 495942599. The next prime is 495942701. The reversal of 495942639 is 936249594.

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 495942639 - 2⁷ = 495942511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 495942591 and 495942600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495940639) 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, 82657104 + ... + 82657109.

It is an arithmetic number, because the mean of its divisors is an integer number (165314214).

Almost surely, 2^495942639 is an apocalyptic number.

495942639 is a deficient number, since it is larger than the sum of its proper divisors (165314217).

495942639 is a wasteful number, since it uses less digits than its factorization.

495942639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165314216.

The product of its digits is 2099520, while the sum is 51.

The square root of 495942639 is about 22269.7696216193. The cubic root of 495942639 is about 791.5478061602.

The spelling of 495942639 in words is "four hundred ninety-five million, nine hundred forty-two thousand, six hundred thirty-nine".