690968825 has 12 divisors (see below), whose sum is σ = 907201980. Its totient is φ = 520258560.

The previous prime is 690968809. The next prime is 690968857. The reversal of 690968825 is 528869096.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 18292729 + 672676096 = 4277^2 + 25936^2 .

It is not a de Polignac number, because 690968825 - 2⁴ = 690968809 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812480 + ... + 813329.

It is an arithmetic number, because the mean of its divisors is an integer number (75600165).

Almost surely, 2^690968825 is an apocalyptic number.

It is an amenable number.

690968825 is a deficient number, since it is larger than the sum of its proper divisors (216233155).

690968825 is a wasteful number, since it uses less digits than its factorization.

690968825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625836 (or 1625831 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 690968825 is about 26286.2858730556. The cubic root of 690968825 is about 884.0689773883.

The spelling of 690968825 in words is "six hundred ninety million, nine hundred sixty-eight thousand, eight hundred twenty-five".