521374717 has 8 divisors (see below), whose sum is σ = 552569472. Its totient is φ = 490238400.

The previous prime is 521374703. The next prime is 521374739. The reversal of 521374717 is 717473125.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521374717 - 2⁷ = 521374589 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 (521374417) 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 7 ways as a sum of consecutive naturals, for example, 4492 + ... + 32602.

It is an arithmetic number, because the mean of its divisors is an integer number (69071184).

Almost surely, 2^521374717 is an apocalyptic number.

It is an amenable number.

521374717 is a deficient number, since it is larger than the sum of its proper divisors (31194755).

521374717 is a wasteful number, since it uses less digits than its factorization.

521374717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29219.

The product of its digits is 41160, while the sum is 37.

The square root of 521374717 is about 22833.6312705623. The cubic root of 521374717 is about 804.8531640672.

The spelling of 521374717 in words is "five hundred twenty-one million, three hundred seventy-four thousand, seven hundred seventeen".