39444481 has 2 divisors, whose sum is σ = 39444482. Its totient is φ = 39444480.

The previous prime is 39444469. The next prime is 39444487. The reversal of 39444481 is 18444493.

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., 26419600 + 13024881 = 5140^2 + 3609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39444481 is a prime.

It is a super-2 number, since 2×39444481² = 3111734162718722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39444481.

It is not a weakly prime, because it can be changed into another prime (39444487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19722240 + 19722241.

It is an arithmetic number, because the mean of its divisors is an integer number (19722241).

It is a Proth number, since it is equal to 4815 ⋅ 2¹³ + 1 and 4815 < 2¹³.

Almost surely, 2^39444481 is an apocalyptic number.

It is an amenable number.

39444481 is a deficient number, since it is larger than the sum of its proper divisors (1).

39444481 is an equidigital number, since it uses as much as digits as its factorization.

39444481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 39444481 is about 6280.4841373894. The cubic root of 39444481 is about 340.4045961987.

The spelling of 39444481 in words is "thirty-nine million, four hundred forty-four thousand, four hundred eighty-one".