455723721 has 12 divisors (see below), whose sum is σ = 692913520. Its totient is φ = 287825400.

The previous prime is 455723711. The next prime is 455723753. The reversal of 455723721 is 127327554.

It is not a de Polignac number, because 455723721 - 2⁹ = 455723209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (455723711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1332355 + ... + 1332696.

Almost surely, 2^455723721 is an apocalyptic number.

It is an amenable number.

455723721 is a deficient number, since it is larger than the sum of its proper divisors (237189799).

455723721 is a wasteful number, since it uses less digits than its factorization.

455723721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665076 (or 2665073 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 455723721 is about 21347.6865491322. The cubic root of 455723721 is about 769.5447474760.

The spelling of 455723721 in words is "four hundred fifty-five million, seven hundred twenty-three thousand, seven hundred twenty-one".