689439572 has 12 divisors (see below), whose sum is σ = 1209106080. Its totient is φ = 343980696.

The previous prime is 689439547. The next prime is 689439577. The reversal of 689439572 is 275934986.

It is a happy number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689439577) 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, 182672 + ... + 186407.

It is an arithmetic number, because the mean of its divisors is an integer number (100758840).

Almost surely, 2^689439572 is an apocalyptic number.

It is an amenable number.

689439572 is a deficient number, since it is larger than the sum of its proper divisors (519666508).

689439572 is a wasteful number, since it uses less digits than its factorization.

689439572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369550 (or 369548 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The square root of 689439572 is about 26257.1813414921. The cubic root of 689439572 is about 883.4162881470.

The spelling of 689439572 in words is "six hundred eighty-nine million, four hundred thirty-nine thousand, five hundred seventy-two".