689136502 has 4 divisors (see below), whose sum is σ = 1033704756. Its totient is φ = 344568250.

The previous prime is 689136499. The next prime is 689136509. The reversal of 689136502 is 205631986.

689136502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689136509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172284124 + ... + 172284127.

It is an arithmetic number, because the mean of its divisors is an integer number (258426189).

Almost surely, 2^689136502 is an apocalyptic number.

689136502 is a deficient number, since it is larger than the sum of its proper divisors (344568254).

689136502 is a wasteful number, since it uses less digits than its factorization.

689136502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344568253.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 689136502 is about 26251.4095240618. The cubic root of 689136502 is about 883.2868225026.

The spelling of 689136502 in words is "six hundred eighty-nine million, one hundred thirty-six thousand, five hundred two".