457220909 has 4 divisors (see below), whose sum is σ = 458871804. Its totient is φ = 455570016.

The previous prime is 457220867. The next prime is 457220927. The reversal of 457220909 is 909022754.

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 234763684 + 222457225 = 15322^2 + 14915^2 .

It is a cyclic number.

It is not a de Polignac number, because 457220909 - 2²⁰ = 456172333 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 (457220969) 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 3 ways as a sum of consecutive naturals, for example, 825032 + ... + 825585.

It is an arithmetic number, because the mean of its divisors is an integer number (114717951).

Almost surely, 2^457220909 is an apocalyptic number.

It is an amenable number.

457220909 is a deficient number, since it is larger than the sum of its proper divisors (1650895).

457220909 is a wasteful number, since it uses less digits than its factorization.

457220909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650894.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 457220909 is about 21382.7245457636. The cubic root of 457220909 is about 770.3865540972.

The spelling of 457220909 in words is "four hundred fifty-seven million, two hundred twenty thousand, nine hundred nine".