139238547 has 24 divisors (see below), whose sum is σ = 216789696. Its totient is φ = 79260048.

The previous prime is 139238543. The next prime is 139238549. The reversal of 139238547 is 745832931.

It is not a de Polignac number, because 139238547 - 2² = 139238543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139238499 and 139238508.

It is not an unprimeable number, because it can be changed into a prime (139238543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39928 + ... + 43274.

It is an arithmetic number, because the mean of its divisors is an integer number (9032904).

Almost surely, 2^139238547 is an apocalyptic number.

139238547 is a deficient number, since it is larger than the sum of its proper divisors (77551149).

139238547 is a wasteful number, since it uses less digits than its factorization.

139238547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647 (or 3640 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 139238547 is about 11799.9384320428. The cubic root of 139238547 is about 518.3063077574.

The spelling of 139238547 in words is "one hundred thirty-nine million, two hundred thirty-eight thousand, five hundred forty-seven".