139368745 has 4 divisors (see below), whose sum is σ = 167242500. Its totient is φ = 111494992.

The previous prime is 139368739. The next prime is 139368763. The reversal of 139368745 is 547863931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547863931 = 1999 ⋅274069.

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 102353689 = 6084^2 + 10117^2 .

It is a cyclic number.

It is not a de Polignac number, because 139368745 - 2¹³ = 139360553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139368695 and 139368704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13936870 + ... + 13936879.

It is an arithmetic number, because the mean of its divisors is an integer number (41810625).

Almost surely, 2^139368745 is an apocalyptic number.

It is an amenable number.

139368745 is a deficient number, since it is larger than the sum of its proper divisors (27873755).

139368745 is an equidigital number, since it uses as much as digits as its factorization.

139368745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27873754.

The product of its digits is 544320, while the sum is 46.

The square root of 139368745 is about 11805.4540361648. The cubic root of 139368745 is about 518.4678085855.

The spelling of 139368745 in words is "one hundred thirty-nine million, three hundred sixty-eight thousand, seven hundred forty-five".