509123497 has 12 divisors (see below), whose sum is σ = 543877516. Its totient is φ = 476478720.

The previous prime is 509123473. The next prime is 509123543. The reversal of 509123497 is 794321905.

It can be written as a sum of positive squares in 6 ways, for example, as 13660416 + 495463081 = 3696^2 + 22259^2 .

It is not a de Polignac number, because 509123497 - 2⁷ = 509123369 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509123897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47443 + ... + 57175.

Almost surely, 2^509123497 is an apocalyptic number.

It is an amenable number.

509123497 is a deficient number, since it is larger than the sum of its proper divisors (34754019).

509123497 is a wasteful number, since it uses less digits than its factorization.

509123497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948 (or 9931 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 509123497 is about 22563.7651335055. The cubic root of 509123497 is about 798.4990068901.

The spelling of 509123497 in words is "five hundred nine million, one hundred twenty-three thousand, four hundred ninety-seven".