690859223 has 2 divisors, whose sum is σ = 690859224. Its totient is φ = 690859222.

The previous prime is 690859217. The next prime is 690859259. The reversal of 690859223 is 322958096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690859223 - 2⁶ = 690859159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690879223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345429611 + 345429612.

It is an arithmetic number, because the mean of its divisors is an integer number (345429612).

Almost surely, 2^690859223 is an apocalyptic number.

690859223 is a deficient number, since it is larger than the sum of its proper divisors (1).

690859223 is an equidigital number, since it uses as much as digits as its factorization.

690859223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 690859223 is about 26284.2010150585. The cubic root of 690859223 is about 884.0222310189.

The spelling of 690859223 in words is "six hundred ninety million, eight hundred fifty-nine thousand, two hundred twenty-three".