139447246 has 4 divisors (see below), whose sum is σ = 209170872. Its totient is φ = 69723622.

The previous prime is 139447241. The next prime is 139447291. The reversal of 139447246 is 642744931.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 139447199 and 139447208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139447241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34861810 + ... + 34861813.

It is an arithmetic number, because the mean of its divisors is an integer number (52292718).

Almost surely, 2^139447246 is an apocalyptic number.

139447246 is a deficient number, since it is larger than the sum of its proper divisors (69723626).

139447246 is an equidigital number, since it uses as much as digits as its factorization.

139447246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69723625.

The product of its digits is 145152, while the sum is 40.

The square root of 139447246 is about 11808.7783449432. The cubic root of 139447246 is about 518.5651345730.

The spelling of 139447246 in words is "one hundred thirty-nine million, four hundred forty-seven thousand, two hundred forty-six".