690676425 has 36 divisors (see below), whose sum is σ = 1309854780. Its totient is φ = 346690560.

The previous prime is 690676417. The next prime is 690676451. The reversal of 690676425 is 524676096.

It can be written as a sum of positive squares in 6 ways, for example, as 17740944 + 672935481 = 4212^2 + 25941^2 .

It is not a de Polignac number, because 690676425 - 2³ = 690676417 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 86460 + ... + 94109.

It is an arithmetic number, because the mean of its divisors is an integer number (36384855).

Almost surely, 2^690676425 is an apocalyptic number.

It is an amenable number.

690676425 is a deficient number, since it is larger than the sum of its proper divisors (619178355).

690676425 is a wasteful number, since it uses less digits than its factorization.

690676425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180602 (or 180594 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 690676425 is about 26280.7234489464. The cubic root of 690676425 is about 883.9442548094.

The spelling of 690676425 in words is "six hundred ninety million, six hundred seventy-six thousand, four hundred twenty-five".