139566274 has 4 divisors (see below), whose sum is σ = 209349414. Its totient is φ = 69783136.

The previous prime is 139566239. The next prime is 139566281. The reversal of 139566274 is 472665931.

139566274 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 472665931 = 1091 ⋅433241.

It can be written as a sum of positive squares in only one way, i.e., 76475025 + 63091249 = 8745^2 + 7943^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139566274.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34891567 + ... + 34891570.

Almost surely, 2^139566274 is an apocalyptic number.

139566274 is a deficient number, since it is larger than the sum of its proper divisors (69783140).

139566274 is an equidigital number, since it uses as much as digits as its factorization.

139566274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69783139.

The product of its digits is 272160, while the sum is 43.

The square root of 139566274 is about 11813.8170800127. The cubic root of 139566274 is about 518.7126365115.

The spelling of 139566274 in words is "one hundred thirty-nine million, five hundred sixty-six thousand, two hundred seventy-four".