920454921 has 15 divisors (see below), whose sum is σ = 1375408573. Its totient is φ = 613454580.

The previous prime is 920454859. The next prime is 920454937. The reversal of 920454921 is 129454029.

The square root of 920454921 is 30339.

It is a perfect power (a square), and thus also a powerful number.

920454921 is a `hidden beast` number, since 92 + 0 + 4 + 549 + 21 = 666.

920454921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 920454921 - 2⁷ = 920454793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920404921) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 271366 + ... + 274736.

Almost surely, 2^920454921 is an apocalyptic number.

920454921 is the 30339-th square number.

920454921 is the 15170-th centered octagonal number.

It is an amenable number.

920454921 is a deficient number, since it is larger than the sum of its proper divisors (454953652).

920454921 is an frugal number, since it uses more digits than its factorization.

920454921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6754 (or 3374 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 920454921 is about 972.7491081659.

Multiplying 920454921 by its sum of digits (36), we get a square (33136377156 = 182034²).

The spelling of 920454921 in words is "nine hundred twenty million, four hundred fifty-four thousand, nine hundred twenty-one".