139253891 has 16 divisors (see below), whose sum is σ = 171429888. Its totient is φ = 110484000.

The previous prime is 139253857. The next prime is 139253893. The reversal of 139253891 is 198352931.

It is not a de Polignac number, because 139253891 - 2¹⁴ = 139237507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139253893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8960 + ... + 18941.

It is an arithmetic number, because the mean of its divisors is an integer number (10714368).

Almost surely, 2^139253891 is an apocalyptic number.

139253891 is a deficient number, since it is larger than the sum of its proper divisors (32175997).

139253891 is a wasteful number, since it uses less digits than its factorization.

139253891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27962.

The product of its digits is 58320, while the sum is 41.

The square root of 139253891 is about 11800.5885870155. The cubic root of 139253891 is about 518.3253460674.

The spelling of 139253891 in words is "one hundred thirty-nine million, two hundred fifty-three thousand, eight hundred ninety-one".