39444209093 has 2 divisors, whose sum is σ = 39444209094. Its totient is φ = 39444209092.

The previous prime is 39444209069. The next prime is 39444209137. The reversal of 39444209093 is 39090244493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38258577604 + 1185631489 = 195598^2 + 34433^2 .

It is a cyclic number.

It is not a de Polignac number, because 39444209093 - 2⁶ = 39444209029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39444200093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19722104546 + 19722104547.

It is an arithmetic number, because the mean of its divisors is an integer number (19722104547).

Almost surely, 2^39444209093 is an apocalyptic number.

It is an amenable number.

39444209093 is a deficient number, since it is larger than the sum of its proper divisors (1).

39444209093 is an equidigital number, since it uses as much as digits as its factorization.

39444209093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 39444209093 in words is "thirty-nine billion, four hundred forty-four million, two hundred nine thousand, ninety-three".