690395 has 4 divisors (see below), whose sum is σ = 828480. Its totient is φ = 552312.

The previous prime is 690377. The next prime is 690397. The reversal of 690395 is 593096.

690395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690395 - 2⁸ = 690139 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (690397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69035 + ... + 69044.

It is an arithmetic number, because the mean of its divisors is an integer number (207120).

2⁶⁹⁰³⁹⁵ is an apocalyptic number.

690395 is a deficient number, since it is larger than the sum of its proper divisors (138085).

690395 is a wasteful number, since it uses less digits than its factorization.

690395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138084.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 690395 is about 830.9001143338. The cubic root of 690395 is about 88.3824180344.

The spelling of 690395 in words is "six hundred ninety thousand, three hundred ninety-five".