690375 has 32 divisors (see below), whose sum is σ = 1317888. Its totient is φ = 314400.

The previous prime is 690367. The next prime is 690377. The reversal of 690375 is 573096.

It is not a de Polignac number, because 690375 - 2³ = 690367 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2494 + ... + 2756.

It is an arithmetic number, because the mean of its divisors is an integer number (41184).

2⁶⁹⁰³⁷⁵ is an apocalyptic number.

690375 is a deficient number, since it is larger than the sum of its proper divisors (627513).

690375 is a wasteful number, since it uses less digits than its factorization.

690375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 690375 is about 830.8880791057. Note that the first 3 decimals coincide. The cubic root of 690375 is about 88.3815645783.

The spelling of 690375 in words is "six hundred ninety thousand, three hundred seventy-five".