139287943 has 8 divisors (see below), whose sum is σ = 143224128. Its totient is φ = 135360864.

The previous prime is 139287913. The next prime is 139287983. The reversal of 139287943 is 349782931.

139287943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139287943 is a prime.

It is a super-2 number, since 2×139287943² = 38802262130342498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139287893 and 139287902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139287913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39105 + ... + 42517.

It is an arithmetic number, because the mean of its divisors is an integer number (17903016).

Almost surely, 2^139287943 is an apocalyptic number.

139287943 is a deficient number, since it is larger than the sum of its proper divisors (3936185).

139287943 is a wasteful number, since it uses less digits than its factorization.

139287943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553.

The product of its digits is 326592, while the sum is 46.

The square root of 139287943 is about 11802.0313082113. The cubic root of 139287943 is about 518.3675916283.

The spelling of 139287943 in words is "one hundred thirty-nine million, two hundred eighty-seven thousand, nine hundred forty-three".