139612811 has 4 divisors (see below), whose sum is σ = 150352272. Its totient is φ = 128873352.

The previous prime is 139612801. The next prime is 139612813. The reversal of 139612811 is 118216931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139612811 - 2¹⁴ = 139596427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139612813) 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 3 ways as a sum of consecutive naturals, for example, 5369711 + ... + 5369736.

It is an arithmetic number, because the mean of its divisors is an integer number (37588068).

Almost surely, 2^139612811 is an apocalyptic number.

139612811 is a deficient number, since it is larger than the sum of its proper divisors (10739461).

139612811 is a wasteful number, since it uses less digits than its factorization.

139612811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10739460.

The product of its digits is 2592, while the sum is 32.

The square root of 139612811 is about 11815.7865163518. The cubic root of 139612811 is about 518.7702833120.

The spelling of 139612811 in words is "one hundred thirty-nine million, six hundred twelve thousand, eight hundred eleven".