690659425 has 36 divisors (see below), whose sum is σ = 919151860. Its totient is φ = 514667520.

The previous prime is 690659399. The next prime is 690659441. The reversal of 690659425 is 524956096.

690659425 = 256³ + 257³ + ... + 289³.

It can be written as a sum of positive squares in 18 ways, for example, as 77651344 + 613008081 = 8812^2 + 24759^2 .

It is not a de Polignac number, because 690659425 - 2¹³ = 690651233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 787087 + ... + 787963.

Almost surely, 2^690659425 is an apocalyptic number.

It is an amenable number.

690659425 is a deficient number, since it is larger than the sum of its proper divisors (228492435).

690659425 is a wasteful number, since it uses less digits than its factorization.

690659425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 690659425 is about 26280.4000159815. The cubic root of 690659425 is about 883.9370024140.

The spelling of 690659425 in words is "six hundred ninety million, six hundred fifty-nine thousand, four hundred twenty-five".