689060906 has 4 divisors (see below), whose sum is σ = 1033591362. Its totient is φ = 344530452.

The previous prime is 689060899. The next prime is 689060921. The reversal of 689060906 is 609060986.

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

It can be written as a sum of positive squares in only one way, i.e., 630461881 + 58599025 = 25109^2 + 7655^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172265225 + ... + 172265228.

Almost surely, 2^689060906 is an apocalyptic number.

689060906 is a deficient number, since it is larger than the sum of its proper divisors (344530456).

689060906 is a wasteful number, since it uses less digits than its factorization.

689060906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344530455.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 689060906 is about 26249.9696380777. The cubic root of 689060906 is about 883.2545234384.

The spelling of 689060906 in words is "six hundred eighty-nine million, sixty thousand, nine hundred six".