491273375 has 16 divisors (see below), whose sum is σ = 626161536. Its totient is φ = 384652000.

The previous prime is 491273371. The next prime is 491273381. The reversal of 491273375 is 573372194.

It is not a de Polignac number, because 491273375 - 2² = 491273371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491273371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35936 + ... + 47685.

It is an arithmetic number, because the mean of its divisors is an integer number (39135096).

Almost surely, 2^491273375 is an apocalyptic number.

491273375 is a deficient number, since it is larger than the sum of its proper divisors (134888161).

491273375 is an equidigital number, since it uses as much as digits as its factorization.

491273375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83683 (or 83673 counting only the distinct ones).

The product of its digits is 158760, while the sum is 41.

The square root of 491273375 is about 22164.6875682920. The cubic root of 491273375 is about 789.0558474425.

It can be divided in two parts, 4912 and 73375, that added together give a palindrome (78287).

The spelling of 491273375 in words is "four hundred ninety-one million, two hundred seventy-three thousand, three hundred seventy-five".