522690493 has 4 divisors (see below), whose sum is σ = 562897468. Its totient is φ = 482483520.

The previous prime is 522690481. The next prime is 522690541. The reversal of 522690493 is 394096225.

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 304921444 + 217769049 = 17462^2 + 14757^2 .

It is a cyclic number.

It is not a de Polignac number, because 522690493 - 2¹³ = 522682301 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 (522690593) 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, 20103468 + ... + 20103493.

It is an arithmetic number, because the mean of its divisors is an integer number (140724367).

Almost surely, 2^522690493 is an apocalyptic number.

It is an amenable number.

522690493 is a deficient number, since it is larger than the sum of its proper divisors (40206975).

522690493 is a wasteful number, since it uses less digits than its factorization.

522690493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40206974.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 522690493 is about 22862.4253525299. The cubic root of 522690493 is about 805.5296556764.

The spelling of 522690493 in words is "five hundred twenty-two million, six hundred ninety thousand, four hundred ninety-three".