491394345 has 64 divisors (see below), whose sum is σ = 870777600. Its totient is φ = 235146240.

The previous prime is 491394341. The next prime is 491394349. The reversal of 491394345 is 543493194.

It is an interprime number because it is at equal distance from previous prime (491394341) and next prime (491394349).

It is not a de Polignac number, because 491394345 - 2² = 491394341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491394297 and 491394306.

It is not an unprimeable number, because it can be changed into a prime (491394341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1296366 + ... + 1296744.

It is an arithmetic number, because the mean of its divisors is an integer number (13605900).

Almost surely, 2^491394345 is an apocalyptic number.

It is an amenable number.

491394345 is a deficient number, since it is larger than the sum of its proper divisors (379383255).

491394345 is a wasteful number, since it uses less digits than its factorization.

491394345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570.

The product of its digits is 233280, while the sum is 42.

The square root of 491394345 is about 22167.4162905829. The cubic root of 491394345 is about 789.1206072125.

The spelling of 491394345 in words is "four hundred ninety-one million, three hundred ninety-four thousand, three hundred forty-five".