690465 has 16 divisors (see below), whose sum is σ = 1115136. Its totient is φ = 364800.

The previous prime is 690449. The next prime is 690467. The reversal of 690465 is 564096.

It is not a de Polignac number, because 690465 - 2⁴ = 690449 is a prime.

It is a Curzon number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2745 + ... + 2985.

It is an arithmetic number, because the mean of its divisors is an integer number (69696).

2⁶⁹⁰⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

690465 is a deficient number, since it is larger than the sum of its proper divisors (424671).

690465 is a wasteful number, since it uses less digits than its factorization.

690465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 690465 is about 830.9422362595. The cubic root of 690465 is about 88.3854050009.

The spelling of 690465 in words is "six hundred ninety thousand, four hundred sixty-five".