491984375 has 42 divisors (see below), whose sum is σ = 659522808. Its totient is φ = 366300000.

The previous prime is 491984351. The next prime is 491984387. The reversal of 491984375 is 573489194.

It is a de Polignac number, because none of the positive numbers 2^k-491984375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 13296857 + ... + 13296893.

It is an arithmetic number, because the mean of its divisors is an integer number (15702924).

Almost surely, 2^491984375 is an apocalyptic number.

491984375 is a deficient number, since it is larger than the sum of its proper divisors (167538433).

491984375 is an frugal number, since it uses more digits than its factorization.

491984375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 65 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 491984375 is about 22180.7207953213. The cubic root of 491984375 is about 789.4363201128.

The spelling of 491984375 in words is "four hundred ninety-one million, nine hundred eighty-four thousand, three hundred seventy-five".