495994981 has 8 divisors (see below), whose sum is σ = 534242720. Its totient is φ = 458961552.

The previous prime is 495994973. The next prime is 495994991. The reversal of 495994981 is 189499594.

It is a happy number.

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 495994981 - 2³ = 495994973 is a prime.

It is a super-2 number, since 2×495994981² = 492022042354380722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495994991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302730 + ... + 304363.

It is an arithmetic number, because the mean of its divisors is an integer number (66780340).

Almost surely, 2^495994981 is an apocalyptic number.

It is an amenable number.

495994981 is a deficient number, since it is larger than the sum of its proper divisors (38247739).

495994981 is a wasteful number, since it uses less digits than its factorization.

495994981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607155.

The product of its digits is 4199040, while the sum is 58.

The square root of 495994981 is about 22270.9447711587. The cubic root of 495994981 is about 791.5756519462.

The spelling of 495994981 in words is "four hundred ninety-five million, nine hundred ninety-four thousand, nine hundred eighty-one".