139579449 has 4 divisors (see below), whose sum is σ = 186105936. Its totient is φ = 93052964.

The previous prime is 139579441. The next prime is 139579481. The reversal of 139579449 is 944975931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944975931 = 3 ⋅314991977.

It is a cyclic number.

It is not a de Polignac number, because 139579449 - 2³ = 139579441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139579441) 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, 23263239 + ... + 23263244.

It is an arithmetic number, because the mean of its divisors is an integer number (46526484).

Almost surely, 2^139579449 is an apocalyptic number.

It is an amenable number.

139579449 is a deficient number, since it is larger than the sum of its proper divisors (46526487).

139579449 is an equidigital number, since it uses as much as digits as its factorization.

139579449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46526486.

The product of its digits is 1224720, while the sum is 51.

The square root of 139579449 is about 11814.3746766386. The cubic root of 139579449 is about 518.7289580859.

The spelling of 139579449 in words is "one hundred thirty-nine million, five hundred seventy-nine thousand, four hundred forty-nine".