139043071 has 4 divisors (see below), whose sum is σ = 139226544. Its totient is φ = 138859600.

The previous prime is 139043059. The next prime is 139043089. The reversal of 139043071 is 170340931.

139043071 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: 170340931 = 43 ⋅3961417.

It is a cyclic number.

It is not a de Polignac number, because 139043071 - 2¹³ = 139034879 is a prime.

It is a super-2 number, since 2×139043071² = 38665951186222082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139046071) 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, 90595 + ... + 92116.

It is an arithmetic number, because the mean of its divisors is an integer number (34806636).

Almost surely, 2^139043071 is an apocalyptic number.

139043071 is a deficient number, since it is larger than the sum of its proper divisors (183473).

139043071 is an equidigital number, since it uses as much as digits as its factorization.

139043071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183472.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 139043071 is about 11791.6525983426. The cubic root of 139043071 is about 518.0636453254.

The spelling of 139043071 in words is "one hundred thirty-nine million, forty-three thousand, seventy-one".