139832479 has 4 divisors (see below), whose sum is σ = 145912176. Its totient is φ = 133752784.

The previous prime is 139832467. The next prime is 139832501. The reversal of 139832479 is 974238931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974238931 = 26489 ⋅36779.

It is a cyclic number.

It is not a de Polignac number, because 139832479 - 2¹⁵ = 139799711 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 (139832579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039814 + ... + 3039859.

It is an arithmetic number, because the mean of its divisors is an integer number (36478044).

Almost surely, 2^139832479 is an apocalyptic number.

139832479 is a deficient number, since it is larger than the sum of its proper divisors (6079697).

139832479 is an equidigital number, since it uses as much as digits as its factorization.

139832479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079696.

The product of its digits is 326592, while the sum is 46.

The square root of 139832479 is about 11825.0783929748. The cubic root of 139832479 is about 519.0422199508.

The spelling of 139832479 in words is "one hundred thirty-nine million, eight hundred thirty-two thousand, four hundred seventy-nine".