690814253 has 2 divisors, whose sum is σ = 690814254. Its totient is φ = 690814252.

The previous prime is 690814231. The next prime is 690814273. The reversal of 690814253 is 352418096.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362407369 + 328406884 = 19037^2 + 18122^2 .

It is a cyclic number.

It is not a de Polignac number, because 690814253 - 2¹² = 690810157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690814273) 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, 345407126 + 345407127.

It is an arithmetic number, because the mean of its divisors is an integer number (345407127).

Almost surely, 2^690814253 is an apocalyptic number.

It is an amenable number.

690814253 is a deficient number, since it is larger than the sum of its proper divisors (1).

690814253 is an equidigital number, since it uses as much as digits as its factorization.

690814253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 690814253 is about 26283.3455442796. The cubic root of 690814253 is about 884.0030494254.

The spelling of 690814253 in words is "six hundred ninety million, eight hundred fourteen thousand, two hundred fifty-three".