139889227 has 2 divisors, whose sum is σ = 139889228. Its totient is φ = 139889226.

The previous prime is 139889213. The next prime is 139889231. The reversal of 139889227 is 722988931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139889227 - 2²⁷ = 5671499 is a prime.

It is not a weakly prime, because it can be changed into another prime (139889237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69944613 + 69944614.

It is an arithmetic number, because the mean of its divisors is an integer number (69944614).

Almost surely, 2^139889227 is an apocalyptic number.

139889227 is a deficient number, since it is larger than the sum of its proper divisors (1).

139889227 is an equidigital number, since it uses as much as digits as its factorization.

139889227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 139889227 is about 11827.4776262735. The cubic root of 139889227 is about 519.1124244901.

The spelling of 139889227 in words is "one hundred thirty-nine million, eight hundred eighty-nine thousand, two hundred twenty-seven".