139794449 has 4 divisors (see below), whose sum is σ = 139853364. Its totient is φ = 139735536.

The previous prime is 139794439. The next prime is 139794509. The reversal of 139794449 is 944497931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944497931 = 13 ⋅72653687.

It can be written as a sum of positive squares in 2 ways, for example, as 99700225 + 40094224 = 9985^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 139794449 - 2¹⁶ = 139728913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139794397 and 139794406.

It is not an unprimeable number, because it can be changed into a prime (139794439) 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, 25742 + ... + 30695.

It is an arithmetic number, because the mean of its divisors is an integer number (34963341).

Almost surely, 2^139794449 is an apocalyptic number.

It is an amenable number.

139794449 is a deficient number, since it is larger than the sum of its proper divisors (58915).

139794449 is an equidigital number, since it uses as much as digits as its factorization.

139794449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58914.

The product of its digits is 979776, while the sum is 50.

The square root of 139794449 is about 11823.4702604608. The cubic root of 139794449 is about 518.9951613430.

The spelling of 139794449 in words is "one hundred thirty-nine million, seven hundred ninety-four thousand, four hundred forty-nine".