920917489 has 16 divisors (see below), whose sum is σ = 993772800. Its totient is φ = 850203904.

The previous prime is 920917477. The next prime is 920917507. The reversal of 920917489 is 984719029.

It is a cyclic number.

It is not a de Polignac number, because 920917489 - 2¹⁵ = 920884721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920917469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720519 + ... + 721795.

It is an arithmetic number, because the mean of its divisors is an integer number (62110800).

Almost surely, 2^920917489 is an apocalyptic number.

It is an amenable number.

920917489 is a deficient number, since it is larger than the sum of its proper divisors (72855311).

920917489 is a wasteful number, since it uses less digits than its factorization.

920917489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 920917489 is about 30346.6223655945. The cubic root of 920917489 is about 972.9120302330.

The spelling of 920917489 in words is "nine hundred twenty million, nine hundred seventeen thousand, four hundred eighty-nine".