497447391 has 16 divisors (see below), whose sum is σ = 758758400. Its totient is φ = 283976928.

The previous prime is 497447369. The next prime is 497447393. The reversal of 497447391 is 193744794.

It is not a de Polignac number, because 497447391 - 2¹⁴ = 497431007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 497447391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497447393) 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 15 ways as a sum of consecutive naturals, for example, 11370 + ... + 33528.

It is an arithmetic number, because the mean of its divisors is an integer number (47422400).

Almost surely, 2^497447391 is an apocalyptic number.

497447391 is a deficient number, since it is larger than the sum of its proper divisors (261311009).

497447391 is a wasteful number, since it uses less digits than its factorization.

497447391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23238.

The product of its digits is 762048, while the sum is 48.

The square root of 497447391 is about 22303.5286670069. The cubic root of 497447391 is about 792.3475495482.

The spelling of 497447391 in words is "four hundred ninety-seven million, four hundred forty-seven thousand, three hundred ninety-one".