522712397 has 4 divisors (see below), whose sum is σ = 528585660. Its totient is φ = 516839136.

The previous prime is 522712387. The next prime is 522712459. The reversal of 522712397 is 793217225.

It is a happy number.

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 318479716 + 204232681 = 17846^2 + 14291^2 .

It is a cyclic number.

It is not a de Polignac number, because 522712397 - 2⁴ = 522712381 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 522712397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522712367) 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 3 ways as a sum of consecutive naturals, for example, 2936498 + ... + 2936675.

It is an arithmetic number, because the mean of its divisors is an integer number (132146415).

Almost surely, 2^522712397 is an apocalyptic number.

It is an amenable number.

522712397 is a deficient number, since it is larger than the sum of its proper divisors (5873263).

522712397 is an equidigital number, since it uses as much as digits as its factorization.

522712397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5873262.

The product of its digits is 52920, while the sum is 38.

The square root of 522712397 is about 22862.9043868009. The cubic root of 522712397 is about 805.5409077624.

The spelling of 522712397 in words is "five hundred twenty-two million, seven hundred twelve thousand, three hundred ninety-seven".