489757631 has 4 divisors (see below), whose sum is σ = 534281064. Its totient is φ = 445234200.

The previous prime is 489757621. The next prime is 489757663. The reversal of 489757631 is 136757984.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489757631 is a prime.

It is a super-2 number, since 2×489757631² = 479725074245464322, which contains 22 as substring.

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 489757631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489757621) 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, 22261700 + ... + 22261721.

It is an arithmetic number, because the mean of its divisors is an integer number (133570266).

Almost surely, 2^489757631 is an apocalyptic number.

489757631 is a deficient number, since it is larger than the sum of its proper divisors (44523433).

489757631 is a wasteful number, since it uses less digits than its factorization.

489757631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44523432.

The product of its digits is 1270080, while the sum is 50.

The square root of 489757631 is about 22130.4683863672. The cubic root of 489757631 is about 788.2435103148.

The spelling of 489757631 in words is "four hundred eighty-nine million, seven hundred fifty-seven thousand, six hundred thirty-one".