457649839 has 2 divisors, whose sum is σ = 457649840. Its totient is φ = 457649838.

The previous prime is 457649833. The next prime is 457649851. The reversal of 457649839 is 938946754.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 457649839 - 2⁷ = 457649711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 457649839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457649833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228824919 + 228824920.

It is an arithmetic number, because the mean of its divisors is an integer number (228824920).

Almost surely, 2^457649839 is an apocalyptic number.

457649839 is a deficient number, since it is larger than the sum of its proper divisors (1).

457649839 is an equidigital number, since it uses as much as digits as its factorization.

457649839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The square root of 457649839 is about 21392.7520202521. The cubic root of 457649839 is about 770.6273848933.

The spelling of 457649839 in words is "four hundred fifty-seven million, six hundred forty-nine thousand, eight hundred thirty-nine".