690312263 has 2 divisors, whose sum is σ = 690312264. Its totient is φ = 690312262.

The previous prime is 690312223. The next prime is 690312269. The reversal of 690312263 is 362213096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690312263 - 2²² = 686117959 is a prime.

It is equal to p_35777111 and since 690312263 and 35777111 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690312269) 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, 345156131 + 345156132.

It is an arithmetic number, because the mean of its divisors is an integer number (345156132).

Almost surely, 2^690312263 is an apocalyptic number.

690312263 is a deficient number, since it is larger than the sum of its proper divisors (1).

690312263 is an equidigital number, since it uses as much as digits as its factorization.

690312263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 690312263 is about 26273.7942254255. The cubic root of 690312263 is about 883.7888730769.

The spelling of 690312263 in words is "six hundred ninety million, three hundred twelve thousand, two hundred sixty-three".