139979911 has 8 divisors (see below), whose sum is σ = 144631424. Its totient is φ = 135336960.

The previous prime is 139979899. The next prime is 139979947. The reversal of 139979911 is 119979931.

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 139979911 - 2¹¹ = 139977863 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 (139977911) 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, 64435 + ... + 66571.

It is an arithmetic number, because the mean of its divisors is an integer number (18078928).

Almost surely, 2^139979911 is an apocalyptic number.

139979911 is a deficient number, since it is larger than the sum of its proper divisors (4651513).

139979911 is a wasteful number, since it uses less digits than its factorization.

139979911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281.

The product of its digits is 137781, while the sum is 49.

The square root of 139979911 is about 11831.3106205526. The cubic root of 139979911 is about 519.2245728033.

The spelling of 139979911 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, nine hundred eleven".