690249 has 8 divisors (see below), whose sum is σ = 1051840. Its totient is φ = 394416.

The previous prime is 690233. The next prime is 690259. The reversal of 690249 is 942096.

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

It is not a de Polignac number, because 690249 - 2⁴ = 690233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 6.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690249.

It is not an unprimeable number, because it can be changed into a prime (690259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16414 + ... + 16455.

It is an arithmetic number, because the mean of its divisors is an integer number (131480).

2⁶⁹⁰²⁴⁹ is an apocalyptic number.

It is an amenable number.

690249 is a deficient number, since it is larger than the sum of its proper divisors (361591).

690249 is a wasteful number, since it uses less digits than its factorization.

690249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32879.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 690249 is about 830.8122531595. The cubic root of 690249 is about 88.3761874260.

It can be divided in two parts, 690 and 249, that added together give a palindrome (939).

The spelling of 690249 in words is "six hundred ninety thousand, two hundred forty-nine".