920327521 has 8 divisors (see below), whose sum is σ = 974747304. Its totient is φ = 865939200.

The previous prime is 920327459. The next prime is 920327587. The reversal of 920327521 is 125723029.

It can be written as a sum of positive squares in 4 ways, for example, as 235929600 + 684397921 = 15360^2 + 26161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 920327521 - 2¹⁷ = 920196449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920327321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81411 + ... + 92023.

It is an arithmetic number, because the mean of its divisors is an integer number (121843413).

Almost surely, 2^920327521 is an apocalyptic number.

It is an amenable number.

920327521 is a deficient number, since it is larger than the sum of its proper divisors (54419783).

920327521 is a wasteful number, since it uses less digits than its factorization.

920327521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 920327521 is about 30336.9003195778. The cubic root of 920327521 is about 972.7042267521.

The spelling of 920327521 in words is "nine hundred twenty million, three hundred twenty-seven thousand, five hundred twenty-one".