690853 has 4 divisors (see below), whose sum is σ = 705600. Its totient is φ = 676108.

The previous prime is 690841. The next prime is 690869. The reversal of 690853 is 358096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690853 - 2⁹ = 690341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690553) 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, 7303 + ... + 7396.

It is an arithmetic number, because the mean of its divisors is an integer number (176400).

2⁶⁹⁰⁸⁵³ is an apocalyptic number.

It is an amenable number.

690853 is a deficient number, since it is larger than the sum of its proper divisors (14747).

690853 is a wasteful number, since it uses less digits than its factorization.

690853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14746.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 690853 is about 831.1756733688. The cubic root of 690853 is about 88.4019576698.

The spelling of 690853 in words is "six hundred ninety thousand, eight hundred fifty-three".