122031989 has 2 divisors, whose sum is σ = 122031990. Its totient is φ = 122031988.

The previous prime is 122031961. The next prime is 122032007. The reversal of 122031989 is 989130221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113592964 + 8439025 = 10658^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 122031989 - 2⁸ = 122031733 is a prime.

It is a super-2 number, since 2×122031989² = 29783612678592242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122031089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61015994 + 61015995.

It is an arithmetic number, because the mean of its divisors is an integer number (61015995).

Almost surely, 2^122031989 is an apocalyptic number.

It is an amenable number.

122031989 is a deficient number, since it is larger than the sum of its proper divisors (1).

122031989 is an equidigital number, since it uses as much as digits as its factorization.

122031989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 122031989 is about 11046.8089962667. The cubic root of 122031989 is about 496.0109109744.

The spelling of 122031989 in words is "one hundred twenty-two million, thirty-one thousand, nine hundred eighty-nine".