689399964 has 48 divisors (see below), whose sum is σ = 1949821440. Its totient is φ = 208908720.

The previous prime is 689399959. The next prime is 689399969. The reversal of 689399964 is 469993986.

It is an interprime number because it is at equal distance from previous prime (689399959) and next prime (689399969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689399969) 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, 288964 + ... + 291339.

It is an arithmetic number, because the mean of its divisors is an integer number (40621280).

Almost surely, 2^689399964 is an apocalyptic number.

It is an amenable number.

689399964 is an abundant number, since it is smaller than the sum of its proper divisors (1260421476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689399964 is a wasteful number, since it uses less digits than its factorization.

689399964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580327 (or 580319 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The square root of 689399964 is about 26256.4270989029. The cubic root of 689399964 is about 883.3993705307.

The spelling of 689399964 in words is "six hundred eighty-nine million, three hundred ninety-nine thousand, nine hundred sixty-four".