491090343 has 4 divisors (see below), whose sum is σ = 654787128. Its totient is φ = 327393560.

The previous prime is 491090323. The next prime is 491090363. The reversal of 491090343 is 343090194.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (491090323) and next prime (491090363).

It is a cyclic number.

It is not a de Polignac number, because 491090343 - 2¹⁴ = 491073959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491090323) 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, 81848388 + ... + 81848393.

It is an arithmetic number, because the mean of its divisors is an integer number (163696782).

Almost surely, 2^491090343 is an apocalyptic number.

491090343 is a deficient number, since it is larger than the sum of its proper divisors (163696785).

491090343 is a wasteful number, since it uses less digits than its factorization.

491090343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163696784.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 491090343 is about 22160.5582736537. The cubic root of 491090343 is about 788.9578433464.

The spelling of 491090343 in words is "four hundred ninety-one million, ninety thousand, three hundred forty-three".