690718867 has 2 divisors, whose sum is σ = 690718868. Its totient is φ = 690718866.

The previous prime is 690718829. The next prime is 690718979. The reversal of 690718867 is 768817096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690718867 - 2⁷ = 690718739 is a prime.

It is not a weakly prime, because it can be changed into another prime (690718807) 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, 345359433 + 345359434.

It is an arithmetic number, because the mean of its divisors is an integer number (345359434).

Almost surely, 2^690718867 is an apocalyptic number.

690718867 is a deficient number, since it is larger than the sum of its proper divisors (1).

690718867 is an equidigital number, since it uses as much as digits as its factorization.

690718867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 690718867 is about 26281.5309105082. The cubic root of 690718867 is about 883.9623605351.

The spelling of 690718867 in words is "six hundred ninety million, seven hundred eighteen thousand, eight hundred sixty-seven".