492978981 has 8 divisors (see below), whose sum is σ = 717060384. Its totient is φ = 298775120.

The previous prime is 492978947. The next prime is 492979007. The reversal of 492978981 is 189879294.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 492978981 - 2¹⁰ = 492977957 is a prime.

It is a super-2 number, since 2×492978981² = 486056551415596722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492978931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469346 + ... + 7469411.

It is an arithmetic number, because the mean of its divisors is an integer number (89632548).

Almost surely, 2^492978981 is an apocalyptic number.

It is an amenable number.

492978981 is a deficient number, since it is larger than the sum of its proper divisors (224081403).

492978981 is a wasteful number, since it uses less digits than its factorization.

492978981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14938771.

The product of its digits is 2612736, while the sum is 57.

The square root of 492978981 is about 22203.1299820543. The cubic root of 492978981 is about 789.9679424047.

The spelling of 492978981 in words is "four hundred ninety-two million, nine hundred seventy-eight thousand, nine hundred eighty-one".