22137989 has 2 divisors, whose sum is σ = 22137990. Its totient is φ = 22137988.

The previous prime is 22137971. The next prime is 22138001. The reversal of 22137989 is 98973122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 6400900 = 3967^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 22137989 - 2¹² = 22133893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22137889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11068994 + 11068995.

It is an arithmetic number, because the mean of its divisors is an integer number (11068995).

Almost surely, 2^22137989 is an apocalyptic number.

It is an amenable number.

22137989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22137989 is an equidigital number, since it uses as much as digits as its factorization.

22137989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 22137989 is about 4705.1024430930. The cubic root of 22137989 is about 280.7885467376.

The spelling of 22137989 in words is "twenty-two million, one hundred thirty-seven thousand, nine hundred eighty-nine".