1239688143 has 12 divisors (see below), whose sum is σ = 1852407960. Its totient is φ = 797960016.

The previous prime is 1239688141. The next prime is 1239688147. The reversal of 1239688143 is 3418869321.

It is not a de Polignac number, because 1239688143 - 2¹ = 1239688141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239688141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2374621 + ... + 2375142.

It is an arithmetic number, because the mean of its divisors is an integer number (154367330).

Almost surely, 2^1239688143 is an apocalyptic number.

1239688143 is a deficient number, since it is larger than the sum of its proper divisors (612719817).

1239688143 is a wasteful number, since it uses less digits than its factorization.

1239688143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749798 (or 4749795 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1239688143 is about 35209.2053730271. The cubic root of 1239688143 is about 1074.2469990462.

The spelling of 1239688143 in words is "one billion, two hundred thirty-nine million, six hundred eighty-eight thousand, one hundred forty-three".