491038943 has 8 divisors (see below), whose sum is σ = 496177920. Its totient is φ = 485910360.

The previous prime is 491038921. The next prime is 491038963. The reversal of 491038943 is 349830194.

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 491038943 - 2⁸ = 491038687 is a prime.

It is a super-2 number, since 2×491038943² = 482238487085114498, which contains 22 as substring.

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 491038943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491038903) 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, 123338 + ... + 127256.

It is an arithmetic number, because the mean of its divisors is an integer number (62022240).

Almost surely, 2^491038943 is an apocalyptic number.

491038943 is a deficient number, since it is larger than the sum of its proper divisors (5138977).

491038943 is a wasteful number, since it uses less digits than its factorization.

491038943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 491038943 is about 22159.3985252308. The cubic root of 491038943 is about 788.9303169461.

The spelling of 491038943 in words is "four hundred ninety-one million, thirty-eight thousand, nine hundred forty-three".