690259967 has 2 divisors, whose sum is σ = 690259968. Its totient is φ = 690259966.

The previous prime is 690259903. The next prime is 690259991. The reversal of 690259967 is 769952096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690259967 - 2⁶ = 690259903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690219967) 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, 345129983 + 345129984.

It is an arithmetic number, because the mean of its divisors is an integer number (345129984).

Almost surely, 2^690259967 is an apocalyptic number.

690259967 is a deficient number, since it is larger than the sum of its proper divisors (1).

690259967 is an equidigital number, since it uses as much as digits as its factorization.

690259967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 690259967 is about 26272.7989943972. The cubic root of 690259967 is about 883.7665547762.

The spelling of 690259967 in words is "six hundred ninety million, two hundred fifty-nine thousand, nine hundred sixty-seven".