491774902 has 8 divisors (see below), whose sum is σ = 737921016. Its totient is φ = 245801232.

The previous prime is 491774893. The next prime is 491774909. The reversal of 491774902 is 209477194.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491774909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35728 + ... + 47539.

It is an arithmetic number, because the mean of its divisors is an integer number (92240127).

Almost surely, 2^491774902 is an apocalyptic number.

491774902 is a deficient number, since it is larger than the sum of its proper divisors (246146114).

491774902 is a wasteful number, since it uses less digits than its factorization.

491774902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86222.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 491774902 is about 22175.9983315295. The cubic root of 491774902 is about 789.3242643392.

The spelling of 491774902 in words is "four hundred ninety-one million, seven hundred seventy-four thousand, nine hundred two".