139281448247 has 4 divisors (see below), whose sum is σ = 140203842096. Its totient is φ = 138359054400.

The previous prime is 139281448223. The next prime is 139281448283. The reversal of 139281448247 is 742844182931.

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 139281448247 - 2³⁴ = 122101579063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139281448447) 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, 461196698 + ... + 461196999.

It is an arithmetic number, because the mean of its divisors is an integer number (35050960524).

Almost surely, 2^139281448247 is an apocalyptic number.

139281448247 is a deficient number, since it is larger than the sum of its proper divisors (922393849).

139281448247 is an equidigital number, since it uses as much as digits as its factorization.

139281448247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922393848.

The product of its digits is 3096576, while the sum is 53.

The spelling of 139281448247 in words is "one hundred thirty-nine billion, two hundred eighty-one million, four hundred forty-eight thousand, two hundred forty-seven".