139280227 has 4 divisors (see below), whose sum is σ = 139326840. Its totient is φ = 139233616.

The previous prime is 139280189. The next prime is 139280231. The reversal of 139280227 is 722082931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139280227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139280192 and 139280201.

It is not an unprimeable number, because it can be changed into a prime (139280257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18493 + ... + 24910.

It is an arithmetic number, because the mean of its divisors is an integer number (34831710).

Almost surely, 2^139280227 is an apocalyptic number.

139280227 is a deficient number, since it is larger than the sum of its proper divisors (46613).

139280227 is an equidigital number, since it uses as much as digits as its factorization.

139280227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46612.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 139280227 is about 11801.7044108044. The cubic root of 139280227 is about 518.3580196149.

The spelling of 139280227 in words is "one hundred thirty-nine million, two hundred eighty thousand, two hundred twenty-seven".