39066421 has 2 divisors, whose sum is σ = 39066422. Its totient is φ = 39066420.

The previous prime is 39066361. The next prime is 39066431. The reversal of 39066421 is 12466093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 16313521 = 4770^2 + 4039^2 .

It is a cyclic number.

It is not a de Polignac number, because 39066421 - 2⁹ = 39065909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39066431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19533210 + 19533211.

It is an arithmetic number, because the mean of its divisors is an integer number (19533211).

Almost surely, 2^39066421 is an apocalyptic number.

It is an amenable number.

39066421 is a deficient number, since it is larger than the sum of its proper divisors (1).

39066421 is an equidigital number, since it uses as much as digits as its factorization.

39066421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 39066421 is about 6250.3136721288. The cubic root of 39066421 is about 339.3135544748.

The spelling of 39066421 in words is "thirty-nine million, sixty-six thousand, four hundred twenty-one".