690690918 has 16 divisors (see below), whose sum is σ = 1381743216. Its totient is φ = 230170080.

The previous prime is 690690853. The next prime is 690690947. The reversal of 690690918 is 819096096.

690690918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14148 + ... + 39768.

It is an arithmetic number, because the mean of its divisors is an integer number (86358951).

Almost surely, 2^690690918 is an apocalyptic number.

690690918 is an abundant number, since it is smaller than the sum of its proper divisors (691052298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690690918 is a wasteful number, since it uses less digits than its factorization.

690690918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30119.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 690690918 is about 26280.9991819185. Note that the first 3 decimals coincide. The cubic root of 690690918 is about 883.9504375958.

The spelling of 690690918 in words is "six hundred ninety million, six hundred ninety thousand, nine hundred eighteen".