456220999 has 4 divisors (see below), whose sum is σ = 491314936. Its totient is φ = 421127064.

The previous prime is 456220991. The next prime is 456221021. The reversal of 456220999 is 999022654.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 456220999 - 2³ = 456220991 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 (456220991) 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, 17546949 + ... + 17546974.

It is an arithmetic number, because the mean of its divisors is an integer number (122828734).

Almost surely, 2^456220999 is an apocalyptic number.

456220999 is a deficient number, since it is larger than the sum of its proper divisors (35093937).

456220999 is a wasteful number, since it uses less digits than its factorization.

456220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35093936.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 456220999 is about 21359.3304904437. The cubic root of 456220999 is about 769.8245504569.

The spelling of 456220999 in words is "four hundred fifty-six million, two hundred twenty thousand, nine hundred ninety-nine".