497749397 has 4 divisors (see below), whose sum is σ = 497926476. Its totient is φ = 497572320.

The previous prime is 497749391. The next prime is 497749487. The reversal of 497749397 is 793947794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134884996 + 362864401 = 11614^2 + 19049^2 .

It is a cyclic number.

It is not a de Polignac number, because 497749397 - 2¹² = 497745301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497749391) 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, 84254 + ... + 89967.

It is an arithmetic number, because the mean of its divisors is an integer number (124481619).

Almost surely, 2^497749397 is an apocalyptic number.

It is an amenable number.

497749397 is a deficient number, since it is larger than the sum of its proper divisors (177079).

497749397 is a wasteful number, since it uses less digits than its factorization.

497749397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177078.

The product of its digits is 12002256, while the sum is 59.

The square root of 497749397 is about 22310.2980033885. The cubic root of 497749397 is about 792.5078648624.

The spelling of 497749397 in words is "four hundred ninety-seven million, seven hundred forty-nine thousand, three hundred ninety-seven".