690849 has 12 divisors (see below), whose sum is σ = 1035216. Its totient is φ = 460404.

The previous prime is 690841. The next prime is 690869. The reversal of 690849 is 948096.

690849 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 690849 - 2³ = 690841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179 + ... + 1664.

It is an arithmetic number, because the mean of its divisors is an integer number (86268).

2⁶⁹⁰⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

690849 is a deficient number, since it is larger than the sum of its proper divisors (344367).

690849 is an equidigital number, since it uses as much as digits as its factorization.

690849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2846 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 690849 is about 831.1732671351. The cubic root of 690849 is about 88.4017870553.

The spelling of 690849 in words is "six hundred ninety thousand, eight hundred forty-nine".