39384421 has 2 divisors, whose sum is σ = 39384422. Its totient is φ = 39384420.

The previous prime is 39384403. The next prime is 39384463. The reversal of 39384421 is 12448393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34928100 + 4456321 = 5910^2 + 2111^2 .

It is a cyclic number.

It is not a de Polignac number, because 39384421 - 2¹¹ = 39382373 is a prime.

It is a super-2 number, since 2×39384421² = 3102265235010482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39384721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19692210 + 19692211.

It is an arithmetic number, because the mean of its divisors is an integer number (19692211).

Almost surely, 2^39384421 is an apocalyptic number.

It is an amenable number.

39384421 is a deficient number, since it is larger than the sum of its proper divisors (1).

39384421 is an equidigital number, since it uses as much as digits as its factorization.

39384421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 39384421 is about 6275.7008373567. The cubic root of 39384421 is about 340.2317364813.

The spelling of 39384421 in words is "thirty-nine million, three hundred eighty-four thousand, four hundred twenty-one".