106440420029989 has 2 divisors, whose sum is σ = 106440420029990. Its totient is φ = 106440420029988.

The previous prime is 106440420029987. The next prime is 106440420030047. The reversal of 106440420029989 is 989920024044601.

It is an a-pointer prime, because the next prime (106440420030047) can be obtained adding 106440420029989 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61267799390625 + 45172620639364 = 7827375^2 + 6721058^2 .

It is a cyclic number.

It is not a de Polignac number, because 106440420029989 - 2¹ = 106440420029987 is a prime.

It is a super-2 number, since 2×106440420029989² (a number of 29 digits) contains 22 as substring.

Together with 106440420029987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106440420029987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53220210014994 + 53220210014995.

It is an arithmetic number, because the mean of its divisors is an integer number (53220210014995).

Almost surely, 2^{106440420029989} is an apocalyptic number.

It is an amenable number.

106440420029989 is a deficient number, since it is larger than the sum of its proper divisors (1).

106440420029989 is an equidigital number, since it uses as much as digits as its factorization.

106440420029989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 106440420029989 in words is "one hundred six trillion, four hundred forty billion, four hundred twenty million, twenty-nine thousand, nine hundred eighty-nine".