690527 has 4 divisors (see below), whose sum is σ = 692496. Its totient is φ = 688560.

The previous prime is 690511. The next prime is 690533. The reversal of 690527 is 725096.

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 690527 - 2⁴ = 690511 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 690527.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690527.

It is not an unprimeable number, because it can be changed into a prime (690127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (173124).

2⁶⁹⁰⁵²⁷ is an apocalyptic number.

690527 is a deficient number, since it is larger than the sum of its proper divisors (1969).

690527 is a wasteful number, since it uses less digits than its factorization.

690527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 690527 is about 830.9795424678. The cubic root of 690527 is about 88.3880504312.

The spelling of 690527 in words is "six hundred ninety thousand, five hundred twenty-seven".