139989543 has 16 divisors (see below), whose sum is σ = 200019456. Its totient is φ = 86775680.

The previous prime is 139989503. The next prime is 139989559. The reversal of 139989543 is 345989931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139989543 - 2⁸ = 139989287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139989503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12303 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (12501216).

Almost surely, 2^139989543 is an apocalyptic number.

139989543 is a deficient number, since it is larger than the sum of its proper divisors (60029913).

139989543 is a wasteful number, since it uses less digits than its factorization.

139989543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33174.

The product of its digits is 1049760, while the sum is 51.

The square root of 139989543 is about 11831.7176690454. The cubic root of 139989543 is about 519.2364817892.

The spelling of 139989543 in words is "one hundred thirty-nine million, nine hundred eighty-nine thousand, five hundred forty-three".