690775 has 6 divisors (see below), whose sum is σ = 856592. Its totient is φ = 552600.

The previous prime is 690757. The next prime is 690787. The reversal of 690775 is 577096.

690775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690775 - 2¹⁷ = 559703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13791 + ... + 13840.

2⁶⁹⁰⁷⁷⁵ is an apocalyptic number.

690775 is a deficient number, since it is larger than the sum of its proper divisors (165817).

690775 is a wasteful number, since it uses less digits than its factorization.

690775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27641 (or 27636 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 690775 is about 831.1287505555. The cubic root of 690775 is about 88.3986305692.

The spelling of 690775 in words is "six hundred ninety thousand, seven hundred seventy-five".