139871941 has 4 divisors (see below), whose sum is σ = 152587584. Its totient is φ = 127156300.

The previous prime is 139871933. The next prime is 139871957. The reversal of 139871941 is 149178931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139871941 - 2³ = 139871933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139871041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6357805 + ... + 6357826.

It is an arithmetic number, because the mean of its divisors is an integer number (38146896).

Almost surely, 2^139871941 is an apocalyptic number.

139871941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139871941 is a deficient number, since it is larger than the sum of its proper divisors (12715643).

139871941 is a wasteful number, since it uses less digits than its factorization.

139871941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12715642.

The product of its digits is 54432, while the sum is 43.

The square root of 139871941 is about 11826.7468477177. The cubic root of 139871941 is about 519.0910415068.

The spelling of 139871941 in words is "one hundred thirty-nine million, eight hundred seventy-one thousand, nine hundred forty-one".