39138311 has 2 divisors, whose sum is σ = 39138312. Its totient is φ = 39138310.

The previous prime is 39138283. The next prime is 39138317. The reversal of 39138311 is 11383193.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39138311 - 2⁶ = 39138247 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39138317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569155 + 19569156.

It is an arithmetic number, because the mean of its divisors is an integer number (19569156).

Almost surely, 2^39138311 is an apocalyptic number.

39138311 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138311 is an equidigital number, since it uses as much as digits as its factorization.

39138311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 39138311 is about 6256.0619402305. The cubic root of 39138311 is about 339.5215617887.

It can be divided in two parts, 391 and 38311, that multiplied together give a triangular number (14979601 = T₅₄₇₃).

The spelling of 39138311 in words is "thirty-nine million, one hundred thirty-eight thousand, three hundred eleven".