39144481 has 2 divisors, whose sum is σ = 39144482. Its totient is φ = 39144480.

The previous prime is 39144473. The next prime is 39144487. The reversal of 39144481 is 18444193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 15085456 = 4905^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 39144481 - 2³ = 39144473 is a prime.

It is a super-2 number, since 2×39144481² = 3064580785518722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39144487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19572240 + 19572241.

It is an arithmetic number, because the mean of its divisors is an integer number (19572241).

Almost surely, 2^39144481 is an apocalyptic number.

It is an amenable number.

39144481 is a deficient number, since it is larger than the sum of its proper divisors (1).

39144481 is an equidigital number, since it uses as much as digits as its factorization.

39144481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 39144481 is about 6256.5550425134. Note that the first 3 decimals coincide. The cubic root of 39144481 is about 339.5394022619.

The spelling of 39144481 in words is "thirty-nine million, one hundred forty-four thousand, four hundred eighty-one".