690049259 has 2 divisors, whose sum is σ = 690049260. Its totient is φ = 690049258.

The previous prime is 690049231. The next prime is 690049267. The reversal of 690049259 is 952940096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690049259 is a prime.

It is not a weakly prime, because it can be changed into another prime (690049219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345024629 + 345024630.

It is an arithmetic number, because the mean of its divisors is an integer number (345024630).

Almost surely, 2^690049259 is an apocalyptic number.

690049259 is a deficient number, since it is larger than the sum of its proper divisors (1).

690049259 is an equidigital number, since it uses as much as digits as its factorization.

690049259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 690049259 is about 26268.7886854343. The cubic root of 690049259 is about 883.6766197549.

The spelling of 690049259 in words is "six hundred ninety million, forty-nine thousand, two hundred fifty-nine".