691026967 has 2 divisors, whose sum is σ = 691026968. Its totient is φ = 691026966.

The previous prime is 691026961. The next prime is 691027013. The reversal of 691026967 is 769620196.

It is an a-pointer prime, because the next prime (691027013) can be obtained adding 691026967 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 691026967 - 2⁷ = 691026839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691026961) 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, 345513483 + 345513484.

It is an arithmetic number, because the mean of its divisors is an integer number (345513484).

Almost surely, 2^691026967 is an apocalyptic number.

691026967 is a deficient number, since it is larger than the sum of its proper divisors (1).

691026967 is an equidigital number, since it uses as much as digits as its factorization.

691026967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 691026967 is about 26287.3917876993. The cubic root of 691026967 is about 884.0937735368.

The spelling of 691026967 in words is "six hundred ninety-one million, twenty-six thousand, nine hundred sixty-seven".