139143771 has 32 divisors (see below), whose sum is σ = 225792000. Its totient is φ = 84163104.

The previous prime is 139143751. The next prime is 139143811. The reversal of 139143771 is 177341931.

It is not a de Polignac number, because 139143771 - 2¹⁵ = 139111003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139143731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17350 + ... + 24068.

It is an arithmetic number, because the mean of its divisors is an integer number (7056000).

Almost surely, 2^139143771 is an apocalyptic number.

139143771 is a deficient number, since it is larger than the sum of its proper divisors (86648229).

139143771 is a wasteful number, since it uses less digits than its factorization.

139143771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800 (or 6794 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 139143771 is about 11795.9217952647. The cubic root of 139143771 is about 518.1886819287.

The spelling of 139143771 in words is "one hundred thirty-nine million, one hundred forty-three thousand, seven hundred seventy-one".