491766994 has 8 divisors (see below), whose sum is σ = 749743308. Its totient is φ = 241852560.

The previous prime is 491766991. The next prime is 491767051. The reversal of 491766994 is 499667194.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 475806969 + 15960025 = 21813^2 + 3995^2 .

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

It is not an unprimeable number, because it can be changed into a prime (491766991) 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, 2015317 + ... + 2015560.

Almost surely, 2^491766994 is an apocalyptic number.

491766994 is a deficient number, since it is larger than the sum of its proper divisors (257976314).

491766994 is a wasteful number, since it uses less digits than its factorization.

491766994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030940.

The product of its digits is 2939328, while the sum is 55.

The square root of 491766994 is about 22175.8200299335. The cubic root of 491766994 is about 789.3200333996.

The spelling of 491766994 in words is "four hundred ninety-one million, seven hundred sixty-six thousand, nine hundred ninety-four".