122729993 has 2 divisors, whose sum is σ = 122729994. Its totient is φ = 122729992.

The previous prime is 122729989. The next prime is 122730007. The reversal of 122729993 is 399927221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99042304 + 23687689 = 9952^2 + 4867^2 .

It is a cyclic number.

It is not a de Polignac number, because 122729993 - 2² = 122729989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122729903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61364996 + 61364997.

It is an arithmetic number, because the mean of its divisors is an integer number (61364997).

Almost surely, 2^122729993 is an apocalyptic number.

It is an amenable number.

122729993 is a deficient number, since it is larger than the sum of its proper divisors (1).

122729993 is an equidigital number, since it uses as much as digits as its factorization.

122729993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 122729993 is about 11078.3569630158. The cubic root of 122729993 is about 496.9548153522.

The spelling of 122729993 in words is "one hundred twenty-two million, seven hundred twenty-nine thousand, nine hundred ninety-three".