690191764 has 12 divisors (see below), whose sum is σ = 1249485300. Its totient is φ = 333195968.

The previous prime is 690191741. The next prime is 690191767. The reversal of 690191764 is 467191096.

It is a happy number.

690191764 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 2 ways, for example, as 230432400 + 459759364 = 15180^2 + 21442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 690191764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690191767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2974849 + ... + 2975080.

It is an arithmetic number, because the mean of its divisors is an integer number (104123775).

Almost surely, 2^690191764 is an apocalyptic number.

It is an amenable number.

690191764 is a deficient number, since it is larger than the sum of its proper divisors (559293536).

690191764 is a wasteful number, since it uses less digits than its factorization.

690191764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949962 (or 5949960 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 690191764 is about 26271.5009849076. The cubic root of 690191764 is about 883.7374461705.

The spelling of 690191764 in words is "six hundred ninety million, one hundred ninety-one thousand, seven hundred sixty-four".