139047647 has 4 divisors (see below), whose sum is σ = 139071240. Its totient is φ = 139024056.

The previous prime is 139047619. The next prime is 139047653. The reversal of 139047647 is 746740931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139047647 - 2⁶ = 139047583 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 (139047047) 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, 5429 + ... + 17537.

It is an arithmetic number, because the mean of its divisors is an integer number (34767810).

Almost surely, 2^139047647 is an apocalyptic number.

139047647 is a deficient number, since it is larger than the sum of its proper divisors (23593).

139047647 is a wasteful number, since it uses less digits than its factorization.

139047647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23592.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 139047647 is about 11791.8466323134. The cubic root of 139047647 is about 518.0693285362.

The spelling of 139047647 in words is "one hundred thirty-nine million, forty-seven thousand, six hundred forty-seven".