39444209069 has 2 divisors, whose sum is σ = 39444209070. Its totient is φ = 39444209068.

The previous prime is 39444209029. The next prime is 39444209093. The reversal of 39444209069 is 96090244493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38274227044 + 1169982025 = 195638^2 + 34205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39444209069 is a prime.

It is a super-2 number, since 2×39444209069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39444209029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19722104534 + 19722104535.

It is an arithmetic number, because the mean of its divisors is an integer number (19722104535).

Almost surely, 2^39444209069 is an apocalyptic number.

It is an amenable number.

39444209069 is a deficient number, since it is larger than the sum of its proper divisors (1).

39444209069 is an equidigital number, since it uses as much as digits as its factorization.

39444209069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 39444209069 in words is "thirty-nine billion, four hundred forty-four million, two hundred nine thousand, sixty-nine".