689995117 has 18 divisors (see below), whose sum is σ = 829431054. Its totient is φ = 572307120.

The previous prime is 689995081. The next prime is 689995139. The reversal of 689995117 is 711599986.

689995117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 655667236 + 34327881 = 25606^2 + 5859^2 .

It is not a de Polignac number, because 689995117 - 2⁷ = 689994989 is a prime.

It is a super-2 number, since 2×689995117² = 952186522967687378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689990117) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39763 + ... + 54415.

It is an arithmetic number, because the mean of its divisors is an integer number (46079503).

Almost surely, 2^689995117 is an apocalyptic number.

It is an amenable number.

689995117 is a deficient number, since it is larger than the sum of its proper divisors (139435937).

689995117 is a wasteful number, since it uses less digits than its factorization.

689995117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14729 (or 14691 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 55.

The square root of 689995117 is about 26267.7581266464. The cubic root of 689995117 is about 883.6535077474.

The spelling of 689995117 in words is "six hundred eighty-nine million, nine hundred ninety-five thousand, one hundred seventeen".