122946991 has 2 divisors, whose sum is σ = 122946992. Its totient is φ = 122946990.

The previous prime is 122946953. The next prime is 122947007. The reversal of 122946991 is 199649221.

It is a strong prime.

It is an emirp because it is prime and its reverse (199649221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122946991 - 2⁹ = 122946479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122946911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61473495 + 61473496.

It is an arithmetic number, because the mean of its divisors is an integer number (61473496).

Almost surely, 2^122946991 is an apocalyptic number.

122946991 is a deficient number, since it is larger than the sum of its proper divisors (1).

122946991 is an equidigital number, since it uses as much as digits as its factorization.

122946991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 122946991 is about 11088.1464185859. The cubic root of 122946991 is about 497.2475302916.

The spelling of 122946991 in words is "one hundred twenty-two million, nine hundred forty-six thousand, nine hundred ninety-one".