690729967 has 2 divisors, whose sum is σ = 690729968. Its totient is φ = 690729966.

The previous prime is 690729953. The next prime is 690729989. The reversal of 690729967 is 769927096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690729967 - 2¹⁹ = 690205679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690729937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345364983 + 345364984.

It is an arithmetic number, because the mean of its divisors is an integer number (345364984).

Almost surely, 2^690729967 is an apocalyptic number.

690729967 is a deficient number, since it is larger than the sum of its proper divisors (1).

690729967 is an equidigital number, since it uses as much as digits as its factorization.

690729967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 690729967 is about 26281.7420845727. The cubic root of 690729967 is about 883.9670956645.

The spelling of 690729967 in words is "six hundred ninety million, seven hundred twenty-nine thousand, nine hundred sixty-seven".