492159621 has 4 divisors (see below), whose sum is σ = 656212832. Its totient is φ = 328106412.

The previous prime is 492159617. The next prime is 492159623. The reversal of 492159621 is 126951294.

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 not a de Polignac number, because 492159621 - 2² = 492159617 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 492159621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492159623) 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, 82026601 + ... + 82026606.

It is an arithmetic number, because the mean of its divisors is an integer number (164053208).

Almost surely, 2^492159621 is an apocalyptic number.

It is an amenable number.

492159621 is a deficient number, since it is larger than the sum of its proper divisors (164053211).

492159621 is a wasteful number, since it uses less digits than its factorization.

492159621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164053210.

The product of its digits is 38880, while the sum is 39.

The square root of 492159621 is about 22184.6708562467. The cubic root of 492159621 is about 789.5300420148.

The spelling of 492159621 in words is "four hundred ninety-two million, one hundred fifty-nine thousand, six hundred twenty-one".