457217393 has 8 divisors (see below), whose sum is σ = 474175080. Its totient is φ = 440339200.

The previous prime is 457217359. The next prime is 457217479. The reversal of 457217393 is 393712754.

It can be written as a sum of positive squares in 4 ways, for example, as 294705889 + 162511504 = 17167^2 + 12748^2 .

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 457217393 - 2¹⁰ = 457216369 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 457217393.

It is not an unprimeable number, because it can be changed into a prime (457216393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8030 + ... + 31287.

It is an arithmetic number, because the mean of its divisors is an integer number (59271885).

Almost surely, 2^457217393 is an apocalyptic number.

It is an amenable number.

457217393 is a deficient number, since it is larger than the sum of its proper divisors (16957687).

457217393 is a wasteful number, since it uses less digits than its factorization.

457217393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39747.

The product of its digits is 158760, while the sum is 41.

The square root of 457217393 is about 21382.6423297028. The cubic root of 457217393 is about 770.3845793507.

The spelling of 457217393 in words is "four hundred fifty-seven million, two hundred seventeen thousand, three hundred ninety-three".