122990999 has 2 divisors, whose sum is σ = 122991000. Its totient is φ = 122990998.

The previous prime is 122990983. The next prime is 122991013. The reversal of 122990999 is 999099221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122990999 - 2⁴ = 122990983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122990909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61495499 + 61495500.

It is an arithmetic number, because the mean of its divisors is an integer number (61495500).

Almost surely, 2^122990999 is an apocalyptic number.

122990999 is a deficient number, since it is larger than the sum of its proper divisors (1).

122990999 is an equidigital number, since it uses as much as digits as its factorization.

122990999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 122990999 is about 11090.1307025661. The cubic root of 122990999 is about 497.3068519519.

The spelling of 122990999 in words is "one hundred twenty-two million, nine hundred ninety thousand, nine hundred ninety-nine".