492039315989 has 4 divisors (see below), whose sum is σ = 529888494156. Its totient is φ = 454190137824.

The previous prime is 492039315983. The next prime is 492039315991. The reversal of 492039315989 is 989513930294.

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

It can be written as a sum of positive squares in 2 ways, for example, as 200609931025 + 291429384964 = 447895^2 + 539842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492039315989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492039315983) 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, 18924589064 + ... + 18924589089.

It is an arithmetic number, because the mean of its divisors is an integer number (132472123539).

Almost surely, 2^492039315989 is an apocalyptic number.

It is an amenable number.

492039315989 is a deficient number, since it is larger than the sum of its proper divisors (37849178167).

492039315989 is a wasteful number, since it uses less digits than its factorization.

492039315989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37849178166.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The spelling of 492039315989 in words is "four hundred ninety-two billion, thirty-nine million, three hundred fifteen thousand, nine hundred eighty-nine".