920489257 has 4 divisors (see below), whose sum is σ = 968936080. Its totient is φ = 872042436.

The previous prime is 920489209. The next prime is 920489263. The reversal of 920489257 is 752984029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 920489257 - 2²⁷ = 786271529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920489057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24223383 + ... + 24223420.

It is an arithmetic number, because the mean of its divisors is an integer number (242234020).

Almost surely, 2^920489257 is an apocalyptic number.

It is an amenable number.

920489257 is a deficient number, since it is larger than the sum of its proper divisors (48446823).

920489257 is a wasteful number, since it uses less digits than its factorization.

920489257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48446822.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 920489257 is about 30339.5658670324. The cubic root of 920489257 is about 972.7612035973.

The spelling of 920489257 in words is "nine hundred twenty million, four hundred eighty-nine thousand, two hundred fifty-seven".