139273271 has 2 divisors, whose sum is σ = 139273272. Its totient is φ = 139273270.

The previous prime is 139273261. The next prime is 139273289. The reversal of 139273271 is 172372931.

It is a weak prime.

It is an emirp because it is prime and its reverse (172372931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139273271 - 2⁶ = 139273207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139273261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69636635 + 69636636.

It is an arithmetic number, because the mean of its divisors is an integer number (69636636).

Almost surely, 2^139273271 is an apocalyptic number.

139273271 is a deficient number, since it is larger than the sum of its proper divisors (1).

139273271 is an equidigital number, since it uses as much as digits as its factorization.

139273271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 139273271 is about 11801.4097039294. The cubic root of 139273271 is about 518.3493901095.

The spelling of 139273271 in words is "one hundred thirty-nine million, two hundred seventy-three thousand, two hundred seventy-one".