920437689 has 4 divisors (see below), whose sum is σ = 1227250256. Its totient is φ = 613625124.

The previous prime is 920437673. The next prime is 920437703. The reversal of 920437689 is 986734029.

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 not a de Polignac number, because 920437689 - 2⁴ = 920437673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920437619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153406279 + ... + 153406284.

It is an arithmetic number, because the mean of its divisors is an integer number (306812564).

Almost surely, 2^920437689 is an apocalyptic number.

It is an amenable number.

920437689 is a deficient number, since it is larger than the sum of its proper divisors (306812567).

920437689 is a wasteful number, since it uses less digits than its factorization.

920437689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306812566.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 920437689 is about 30338.7160077680. The cubic root of 920437689 is about 972.7430377917.

The spelling of 920437689 in words is "nine hundred twenty million, four hundred thirty-seven thousand, six hundred eighty-nine".