139218011 has 8 divisors (see below), whose sum is σ = 145964544. Its totient is φ = 132529320.

The previous prime is 139217999. The next prime is 139218059. The reversal of 139218011 is 110812931.

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 139218011 - 2¹⁸ = 138955867 is a prime.

It is a super-2 number, since 2×139218011² = 38763309173592242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139218061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9491 + ... + 19196.

It is an arithmetic number, because the mean of its divisors is an integer number (18245568).

Almost surely, 2^139218011 is an apocalyptic number.

139218011 is a deficient number, since it is larger than the sum of its proper divisors (6746533).

139218011 is a wasteful number, since it uses less digits than its factorization.

139218011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28921.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 139218011 is about 11799.0682259236. The cubic root of 139218011 is about 518.2808252027.

The spelling of 139218011 in words is "one hundred thirty-nine million, two hundred eighteen thousand, eleven".