122299987 has 2 divisors, whose sum is σ = 122299988. Its totient is φ = 122299986.

The previous prime is 122299949. The next prime is 122300011. The reversal of 122299987 is 789992221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122299987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122299987.

It is not a weakly prime, because it can be changed into another prime (122299087) 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, 61149993 + 61149994.

It is an arithmetic number, because the mean of its divisors is an integer number (61149994).

Almost surely, 2^122299987 is an apocalyptic number.

122299987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122299987 is an equidigital number, since it uses as much as digits as its factorization.

122299987 is an odious number, because the sum of its binary digits is odd.

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

The square root of 122299987 is about 11058.9324529992. The cubic root of 122299987 is about 496.3737468213.

The spelling of 122299987 in words is "one hundred twenty-two million, two hundred ninety-nine thousand, nine hundred eighty-seven".