690861875 has 30 divisors (see below), whose sum is σ = 944763204. Its totient is φ = 500860000.

The previous prime is 690861841. The next prime is 690861881. The reversal of 690861875 is 578168096.

It is a happy number.

It is not a de Polignac number, because 690861875 - 2¹⁶ = 690796339 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 29 ways as a sum of consecutive naturals, for example, 2179217 + ... + 2179533.

Almost surely, 2^690861875 is an apocalyptic number.

690861875 is a deficient number, since it is larger than the sum of its proper divisors (253901329).

690861875 is an frugal number, since it uses more digits than its factorization.

690861875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 690861875 is about 26284.2514635665. The cubic root of 690861875 is about 884.0233621823.

The spelling of 690861875 in words is "six hundred ninety million, eight hundred sixty-one thousand, eight hundred seventy-five".