39993427 has 2 divisors, whose sum is σ = 39993428. Its totient is φ = 39993426.

The previous prime is 39993419. The next prime is 39993431. The reversal of 39993427 is 72439993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39993427 - 2³ = 39993419 is a prime.

It is not a weakly prime, because it can be changed into another prime (39993127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19996713 + 19996714.

It is an arithmetic number, because the mean of its divisors is an integer number (19996714).

Almost surely, 2^39993427 is an apocalyptic number.

39993427 is a deficient number, since it is larger than the sum of its proper divisors (1).

39993427 is an equidigital number, since it uses as much as digits as its factorization.

39993427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 39993427 is about 6324.0356577110. The cubic root of 39993427 is about 341.9764555227.

The spelling of 39993427 in words is "thirty-nine million, nine hundred ninety-three thousand, four hundred twenty-seven".