689578975 has 12 divisors (see below), whose sum is σ = 855420696. Its totient is φ = 551442080.

The previous prime is 689578957. The next prime is 689578987. The reversal of 689578975 is 579875986.

It is not a de Polignac number, because 689578975 - 2⁵ = 689578943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91449 + ... + 98701.

It is an arithmetic number, because the mean of its divisors is an integer number (71285058).

Almost surely, 2^689578975 is an apocalyptic number.

689578975 is a deficient number, since it is larger than the sum of its proper divisors (165841721).

689578975 is a wasteful number, since it uses less digits than its factorization.

689578975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066 (or 11061 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 64.

The square root of 689578975 is about 26259.8357763334. The cubic root of 689578975 is about 883.4758256741.

The spelling of 689578975 in words is "six hundred eighty-nine million, five hundred seventy-eight thousand, nine hundred seventy-five".