690873424 has 20 divisors (see below), whose sum is σ = 1346310036. Its totient is φ = 343438592.

The previous prime is 690873419. The next prime is 690873437. The reversal of 690873424 is 424378096.

It can be written as a sum of positive squares in 2 ways, for example, as 601230400 + 89643024 = 24520^2 + 9468^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122029 + ... + 127564.

Almost surely, 2^690873424 is an apocalyptic number.

It is an amenable number.

690873424 is a deficient number, since it is larger than the sum of its proper divisors (655436612).

690873424 is a wasteful number, since it uses less digits than its factorization.

690873424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249774 (or 249768 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 690873424 is about 26284.4711569398. The cubic root of 690873424 is about 884.0282881688.

The spelling of 690873424 in words is "six hundred ninety million, eight hundred seventy-three thousand, four hundred twenty-four".