139647994 has 8 divisors (see below), whose sum is σ = 216229248. Its totient is φ = 67571580.

The previous prime is 139647943. The next prime is 139647997. The reversal of 139647994 is 499746931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (139647997) 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, 1126132 + ... + 1126255.

It is an arithmetic number, because the mean of its divisors is an integer number (27028656).

Almost surely, 2^139647994 is an apocalyptic number.

139647994 is a deficient number, since it is larger than the sum of its proper divisors (76581254).

139647994 is a wasteful number, since it uses less digits than its factorization.

139647994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252420.

The product of its digits is 1469664, while the sum is 52.

The square root of 139647994 is about 11817.2752358570. The cubic root of 139647994 is about 518.8138570638.

The spelling of 139647994 in words is "one hundred thirty-nine million, six hundred forty-seven thousand, nine hundred ninety-four".