491794401 has 8 divisors (see below), whose sum is σ = 749401024. Its totient is φ = 281025360.

The previous prime is 491794399. The next prime is 491794421. The reversal of 491794401 is 104497194.

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

It is not a de Polignac number, because 491794401 - 2¹ = 491794399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491794401.

It is not an unprimeable number, because it can be changed into a prime (491794421) 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, 11709370 + ... + 11709411.

It is an arithmetic number, because the mean of its divisors is an integer number (93675128).

Almost surely, 2^491794401 is an apocalyptic number.

It is an amenable number.

491794401 is a deficient number, since it is larger than the sum of its proper divisors (257606623).

491794401 is a wasteful number, since it uses less digits than its factorization.

491794401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23418791.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 491794401 is about 22176.4379691600. The cubic root of 491794401 is about 789.3346965040.

The spelling of 491794401 in words is "four hundred ninety-one million, seven hundred ninety-four thousand, four hundred one".