139864227 has 4 divisors (see below), whose sum is σ = 186485640. Its totient is φ = 93242816.

The previous prime is 139864217. The next prime is 139864229. The reversal of 139864227 is 722468931.

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

It is a cyclic number.

It is not a de Polignac number, because 139864227 - 2²⁴ = 123087011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139864229) 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 in 3 ways as a sum of consecutive naturals, for example, 23310702 + ... + 23310707.

It is an arithmetic number, because the mean of its divisors is an integer number (46621410).

Almost surely, 2^139864227 is an apocalyptic number.

139864227 is a deficient number, since it is larger than the sum of its proper divisors (46621413).

139864227 is an equidigital number, since it uses as much as digits as its factorization.

139864227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46621412.

The product of its digits is 145152, while the sum is 42.

The square root of 139864227 is about 11826.4207180364. The cubic root of 139864227 is about 519.0814986305.

The spelling of 139864227 in words is "one hundred thirty-nine million, eight hundred sixty-four thousand, two hundred twenty-seven".