139018671 has 12 divisors (see below), whose sum is σ = 219059880. Its totient is φ = 84253680.

The previous prime is 139018669. The next prime is 139018697. The reversal of 139018671 is 176810931.

It is not a de Polignac number, because 139018671 - 2¹ = 139018669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139018631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 702016 + ... + 702213.

It is an arithmetic number, because the mean of its divisors is an integer number (18254990).

Almost surely, 2^139018671 is an apocalyptic number.

139018671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139018671 is a deficient number, since it is larger than the sum of its proper divisors (80041209).

139018671 is a wasteful number, since it uses less digits than its factorization.

139018671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404246 (or 1404243 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 139018671 is about 11790.6179227384. The cubic root of 139018671 is about 518.0333393865.

The spelling of 139018671 in words is "one hundred thirty-nine million, eighteen thousand, six hundred seventy-one".