689382955 has 4 divisors (see below), whose sum is σ = 827259552. Its totient is φ = 551506360.

The previous prime is 689382943. The next prime is 689382959. The reversal of 689382955 is 559283986.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 689382955 - 2²⁷ = 555165227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689382896 and 689382905.

It is not an unprimeable number, because it can be changed into a prime (689382959) 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, 68938291 + ... + 68938300.

It is an arithmetic number, because the mean of its divisors is an integer number (206814888).

Almost surely, 2^689382955 is an apocalyptic number.

689382955 is a deficient number, since it is larger than the sum of its proper divisors (137876597).

689382955 is a wasteful number, since it uses less digits than its factorization.

689382955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137876596.

The product of its digits is 4665600, while the sum is 55.

The square root of 689382955 is about 26256.1031952573. The cubic root of 689382955 is about 883.3921053416.

The spelling of 689382955 in words is "six hundred eighty-nine million, three hundred eighty-two thousand, nine hundred fifty-five".