491634375 has 36 divisors (see below), whose sum is σ = 822931704. Its totient is φ = 261060000.

The previous prime is 491634371. The next prime is 491634383. The reversal of 491634375 is 573436194.

It is not a de Polignac number, because 491634375 - 2² = 491634371 is a prime.

Its product of digits (272160) is a multiple of the sum of its prime factors (486).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491634371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2146761 + ... + 2146989.

It is an arithmetic number, because the mean of its divisors is an integer number (22859214).

Almost surely, 2^491634375 is an apocalyptic number.

491634375 is a deficient number, since it is larger than the sum of its proper divisors (331297329).

491634375 is an frugal number, since it uses more digits than its factorization.

491634375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 237 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 491634375 is about 22172.8296570375. The cubic root of 491634375 is about 789.2490727983.

The spelling of 491634375 in words is "four hundred ninety-one million, six hundred thirty-four thousand, three hundred seventy-five".