495872639 has 8 divisors (see below), whose sum is σ = 505887120. Its totient is φ = 485911936.

The previous prime is 495872579. The next prime is 495872687. The reversal of 495872639 is 936278594.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 495872639 - 2⁸ = 495872383 is a prime.

It is a super-4 number, since 4×495872639⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495872539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5447 + ... + 31959.

It is an arithmetic number, because the mean of its divisors is an integer number (63235890).

Almost surely, 2^495872639 is an apocalyptic number.

495872639 is a deficient number, since it is larger than the sum of its proper divisors (10014481).

495872639 is a wasteful number, since it uses less digits than its factorization.

495872639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26889.

The product of its digits is 3265920, while the sum is 53.

The square root of 495872639 is about 22268.1979288850. The cubic root of 495872639 is about 791.5105633091.

The spelling of 495872639 in words is "four hundred ninety-five million, eight hundred seventy-two thousand, six hundred thirty-nine".