122289997 has 2 divisors, whose sum is σ = 122289998. Its totient is φ = 122289996.

The previous prime is 122289991. The next prime is 122290019. The reversal of 122289997 is 799982221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108555561 + 13734436 = 10419^2 + 3706^2 .

It is an emirp because it is prime and its reverse (799982221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122289997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122289997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122289991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61144998 + 61144999.

It is an arithmetic number, because the mean of its divisors is an integer number (61144999).

Almost surely, 2^122289997 is an apocalyptic number.

It is an amenable number.

122289997 is a deficient number, since it is larger than the sum of its proper divisors (1).

122289997 is an equidigital number, since it uses as much as digits as its factorization.

122289997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 122289997 is about 11058.4807726921. The cubic root of 122289997 is about 496.3602311242.

It can be divided in two parts, 1222 and 89997, that added together give a palindrome (91219).

The spelling of 122289997 in words is "one hundred twenty-two million, two hundred eighty-nine thousand, nine hundred ninety-seven".