122437981 has 2 divisors, whose sum is σ = 122437982. Its totient is φ = 122437980.

The previous prime is 122437967. The next prime is 122437999. The reversal of 122437981 is 189734221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112572100 + 9865881 = 10610^2 + 3141^2 .

It is a cyclic number.

It is not a de Polignac number, because 122437981 - 2¹¹ = 122435933 is a prime.

It is a super-2 number, since 2×122437981² = 29982118382712722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_6972490 and since 122437981 and 6972490 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122437981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122437781) 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, 61218990 + 61218991.

It is an arithmetic number, because the mean of its divisors is an integer number (61218991).

Almost surely, 2^122437981 is an apocalyptic number.

It is an amenable number.

122437981 is a deficient number, since it is larger than the sum of its proper divisors (1).

122437981 is an equidigital number, since it uses as much as digits as its factorization.

122437981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 122437981 is about 11065.1697230544. The cubic root of 122437981 is about 496.5603667726.

The spelling of 122437981 in words is "one hundred twenty-two million, four hundred thirty-seven thousand, nine hundred eighty-one".