690887523 has 8 divisors (see below), whose sum is σ = 923373136. Its totient is φ = 459496800.

The previous prime is 690887513. The next prime is 690887539. The reversal of 690887523 is 325788096.

690887523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690887523 - 2⁴ = 690887507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690887513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272248 + ... + 274773.

It is an arithmetic number, because the mean of its divisors is an integer number (115421642).

Almost surely, 2^690887523 is an apocalyptic number.

690887523 is a deficient number, since it is larger than the sum of its proper divisors (232485613).

690887523 is a wasteful number, since it uses less digits than its factorization.

690887523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547445.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 690887523 is about 26284.7393557555. The cubic root of 690887523 is about 884.0343017306.

The spelling of 690887523 in words is "six hundred ninety million, eight hundred eighty-seven thousand, five hundred twenty-three".