139888943 has 2 divisors, whose sum is σ = 139888944. Its totient is φ = 139888942.

The previous prime is 139888913. The next prime is 139888949. The reversal of 139888943 is 349888931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139888943 - 2²² = 135694639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139888949) 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 as a sum of consecutive naturals, namely, 69944471 + 69944472.

It is an arithmetic number, because the mean of its divisors is an integer number (69944472).

Almost surely, 2^139888943 is an apocalyptic number.

139888943 is a deficient number, since it is larger than the sum of its proper divisors (1).

139888943 is an equidigital number, since it uses as much as digits as its factorization.

139888943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The square root of 139888943 is about 11827.4656203263. The cubic root of 139888943 is about 519.1120731930.

The spelling of 139888943 in words is "one hundred thirty-nine million, eight hundred eighty-eight thousand, nine hundred forty-three".