494767981 has 8 divisors (see below), whose sum is σ = 496872000. Its totient is φ = 492669408.

The previous prime is 494767963. The next prime is 494767991. The reversal of 494767981 is 189767494.

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 494767981 - 2²³ = 486379373 is a prime.

It is a super-2 number, since 2×494767981² = 489590710045632722, 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 (494767921) 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, 307080 + ... + 308686.

It is an arithmetic number, because the mean of its divisors is an integer number (62109000).

Almost surely, 2^494767981 is an apocalyptic number.

It is an amenable number.

494767981 is a deficient number, since it is larger than the sum of its proper divisors (2104019).

494767981 is a wasteful number, since it uses less digits than its factorization.

494767981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its digits is 3048192, while the sum is 55.

The square root of 494767981 is about 22243.3806108694. The cubic root of 494767981 is about 790.9223756205.

The spelling of 494767981 in words is "four hundred ninety-four million, seven hundred sixty-seven thousand, nine hundred eighty-one".