139386211 has 2 divisors, whose sum is σ = 139386212. Its totient is φ = 139386210.

The previous prime is 139386173. The next prime is 139386229. The reversal of 139386211 is 112683931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139386211 is a prime.

It is not a weakly prime, because it can be changed into another prime (139386241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69693105 + 69693106.

It is an arithmetic number, because the mean of its divisors is an integer number (69693106).

Almost surely, 2^139386211 is an apocalyptic number.

139386211 is a deficient number, since it is larger than the sum of its proper divisors (1).

139386211 is an equidigital number, since it uses as much as digits as its factorization.

139386211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 139386211 is about 11806.1937558216. The cubic root of 139386211 is about 518.4894661924.

The spelling of 139386211 in words is "one hundred thirty-nine million, three hundred eighty-six thousand, two hundred eleven".