122697691 has 2 divisors, whose sum is σ = 122697692. Its totient is φ = 122697690.

The previous prime is 122697643. The next prime is 122697697. The reversal of 122697691 is 196796221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (196796221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122697691 - 2⁷ = 122697563 is a prime.

It is not a weakly prime, because it can be changed into another prime (122697697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61348845 + 61348846.

It is an arithmetic number, because the mean of its divisors is an integer number (61348846).

Almost surely, 2^122697691 is an apocalyptic number.

122697691 is a deficient number, since it is larger than the sum of its proper divisors (1).

122697691 is an equidigital number, since it uses as much as digits as its factorization.

122697691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 122697691 is about 11076.8989794075. The cubic root of 122697691 is about 496.9112127451.

The spelling of 122697691 in words is "one hundred twenty-two million, six hundred ninety-seven thousand, six hundred ninety-one".