497739261 has 4 divisors (see below), whose sum is σ = 663652352. Its totient is φ = 331826172.

The previous prime is 497739247. The next prime is 497739269. The reversal of 497739261 is 162937794.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 497739261 - 2⁶ = 497739197 is a prime.

It is a super-2 number, since 2×497739261² = 495488743881652242, which contains 22 as substring.

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 497739261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497739269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82956541 + ... + 82956546.

It is an arithmetic number, because the mean of its divisors is an integer number (165913088).

Almost surely, 2^497739261 is an apocalyptic number.

It is an amenable number.

497739261 is a deficient number, since it is larger than the sum of its proper divisors (165913091).

497739261 is a wasteful number, since it uses less digits than its factorization.

497739261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165913090.

The product of its digits is 571536, while the sum is 48.

The square root of 497739261 is about 22310.0708425590. The cubic root of 497739261 is about 792.5024853720.

The spelling of 497739261 in words is "four hundred ninety-seven million, seven hundred thirty-nine thousand, two hundred sixty-one".