39081641 has 2 divisors, whose sum is σ = 39081642. Its totient is φ = 39081640.

The previous prime is 39081611. The next prime is 39081649. The reversal of 39081641 is 14618093.

39081641 = 4420² + 4421².

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., 19545241 + 19536400 = 4421^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 39081641 - 2¹⁰ = 39080617 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39081598 and 39081607.

It is not a weakly prime, because it can be changed into another prime (39081649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19540820 + 19540821.

It is an arithmetic number, because the mean of its divisors is an integer number (19540821).

Almost surely, 2^39081641 is an apocalyptic number.

39081641 is the 4421-st centered square number.

It is an amenable number.

39081641 is a deficient number, since it is larger than the sum of its proper divisors (1).

39081641 is an equidigital number, since it uses as much as digits as its factorization.

39081641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 39081641 is about 6251.5310924605. The cubic root of 39081641 is about 339.3576134701.

The spelling of 39081641 in words is "thirty-nine million, eighty-one thousand, six hundred forty-one".