139739045 has 4 divisors (see below), whose sum is σ = 167686860. Its totient is φ = 111791232.

The previous prime is 139739011. The next prime is 139739051. The reversal of 139739045 is 540937931.

139739045 is digitally balanced in base 2, 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: 540937931 = 709 ⋅762959.

It can be written as a sum of positive squares in 2 ways, for example, as 61434244 + 78304801 = 7838^2 + 8849^2 .

It is a cyclic number.

It is not a de Polignac number, because 139739045 - 2¹⁰ = 139738021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139738993 and 139739011.

It is a congruent number.

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, 13973900 + ... + 13973909.

It is an arithmetic number, because the mean of its divisors is an integer number (41921715).

Almost surely, 2^139739045 is an apocalyptic number.

It is an amenable number.

139739045 is a deficient number, since it is larger than the sum of its proper divisors (27947815).

139739045 is an equidigital number, since it uses as much as digits as its factorization.

139739045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947814.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 139739045 is about 11821.1270613254. The cubic root of 139739045 is about 518.9265887407.

The spelling of 139739045 in words is "one hundred thirty-nine million, seven hundred thirty-nine thousand, forty-five".