492639749 has 4 divisors (see below), whose sum is σ = 563016864. Its totient is φ = 422262636.

The previous prime is 492639671. The next prime is 492639751. The reversal of 492639749 is 947936294.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 492639749 - 2⁸ = 492639493 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 492639749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492639799) 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, 35188547 + ... + 35188560.

It is an arithmetic number, because the mean of its divisors is an integer number (140754216).

Almost surely, 2^492639749 is an apocalyptic number.

It is an amenable number.

492639749 is a deficient number, since it is larger than the sum of its proper divisors (70377115).

492639749 is an equidigital number, since it uses as much as digits as its factorization.

492639749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70377114.

The product of its digits is 2939328, while the sum is 53.

The square root of 492639749 is about 22195.4893841069. The cubic root of 492639749 is about 789.7867014814.

The spelling of 492639749 in words is "four hundred ninety-two million, six hundred thirty-nine thousand, seven hundred forty-nine".