491547399 has 16 divisors (see below), whose sum is σ = 751699200. Its totient is φ = 279881280.

The previous prime is 491547379. The next prime is 491547473. The reversal of 491547399 is 993745194.

It is not a de Polignac number, because 491547399 - 2⁸ = 491547143 is a prime.

It is a super-4 number, since 4×491547399⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491547379) 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, 35749 + ... + 47550.

It is an arithmetic number, because the mean of its divisors is an integer number (46981200).

Almost surely, 2^491547399 is an apocalyptic number.

491547399 is a deficient number, since it is larger than the sum of its proper divisors (260151801).

491547399 is a wasteful number, since it uses less digits than its factorization.

491547399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83590.

The product of its digits is 1224720, while the sum is 51.

The square root of 491547399 is about 22170.8682509278. The cubic root of 491547399 is about 789.2025275204.

The spelling of 491547399 in words is "four hundred ninety-one million, five hundred forty-seven thousand, three hundred ninety-nine".