497691481 has 9 divisors (see below), whose sum is σ = 579128949. Its totient is φ = 426458844.

The previous prime is 497691479. The next prime is 497691487. The reversal of 497691481 is 184196794.

The square root of 497691481 is 22309.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 497691481 - 2¹ = 497691479 is a prime.

It is a super-2 number, since 2×497691481² = 495393620519946722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (497691487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 154570 + ... + 157756.

It is an arithmetic number, because the mean of its divisors is an integer number (64347661).

Almost surely, 2^497691481 is an apocalyptic number.

497691481 is the 22309-th square number.

497691481 is the 11155-th centered octagonal number.

It is an amenable number.

497691481 is a deficient number, since it is larger than the sum of its proper divisors (81437468).

497691481 is an frugal number, since it uses more digits than its factorization.

497691481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388 (or 3194 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The cubic root of 497691481 is about 792.4771260568.

Multiplying 497691481 by its sum of digits (49), we get a square (24386882569 = 156163²).

497691481 divided by its sum of digits (49) gives a square (10156969 = 3187²).

The spelling of 497691481 in words is "four hundred ninety-seven million, six hundred ninety-one thousand, four hundred eighty-one".