139640911 has 8 divisors (see below), whose sum is σ = 142590240. Its totient is φ = 136722432.

The previous prime is 139640869. The next prime is 139641001. The reversal of 139640911 is 119046931.

It is a happy number.

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 139640911 - 2⁷ = 139640783 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 (139640311) 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, 1551 + ... + 16783.

It is an arithmetic number, because the mean of its divisors is an integer number (17823780).

Almost surely, 2^139640911 is an apocalyptic number.

139640911 is a deficient number, since it is larger than the sum of its proper divisors (2949329).

139640911 is a wasteful number, since it uses less digits than its factorization.

139640911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15425.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 139640911 is about 11816.9755436829. The cubic root of 139640911 is about 518.8050854360.

The spelling of 139640911 in words is "one hundred thirty-nine million, six hundred forty thousand, nine hundred eleven".