139111939 has 8 divisors (see below), whose sum is σ = 148441040. Its totient is φ = 129983616.

The previous prime is 139111937. The next prime is 139111949. The reversal of 139111939 is 939111931.

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

It is a cyclic number.

It is not a de Polignac number, because 139111939 - 2¹ = 139111937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139111898 and 139111907.

It is not an unprimeable number, because it can be changed into a prime (139111937) 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 7 ways as a sum of consecutive naturals, for example, 48762 + ... + 51535.

It is an arithmetic number, because the mean of its divisors is an integer number (18555130).

Almost surely, 2^139111939 is an apocalyptic number.

139111939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139111939 is a deficient number, since it is larger than the sum of its proper divisors (9329101).

139111939 is a wasteful number, since it uses less digits than its factorization.

139111939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100389.

The product of its digits is 6561, while the sum is 37.

The square root of 139111939 is about 11794.5724382022. The cubic root of 139111939 is about 518.1491634747.

The spelling of 139111939 in words is "one hundred thirty-nine million, one hundred eleven thousand, nine hundred thirty-nine".