492789561 has 12 divisors (see below), whose sum is σ = 722215536. Its totient is φ = 298660120.

The previous prime is 492789553. The next prime is 492789571. The reversal of 492789561 is 165987294.

It is not a de Polignac number, because 492789561 - 2³ = 492789553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (492789511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678411 + ... + 679136.

It is an arithmetic number, because the mean of its divisors is an integer number (60184628).

Almost surely, 2^492789561 is an apocalyptic number.

It is an amenable number.

492789561 is a deficient number, since it is larger than the sum of its proper divisors (229425975).

492789561 is a wasteful number, since it uses less digits than its factorization.

492789561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357572 (or 1357561 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 492789561 is about 22198.8639574191. The cubic root of 492789561 is about 789.8667515476.

The spelling of 492789561 in words is "four hundred ninety-two million, seven hundred eighty-nine thousand, five hundred sixty-one".