139059649 has 4 divisors (see below), whose sum is σ = 139863636. Its totient is φ = 138255664.

The previous prime is 139059619. The next prime is 139059667. The reversal of 139059649 is 946950931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98010000 + 41049649 = 9900^2 + 6407^2 .

It is a cyclic number.

It is not a de Polignac number, because 139059649 - 2²³ = 130671041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139059599 and 139059608.

It is not an unprimeable number, because it can be changed into a prime (139059619) 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, 401734 + ... + 402079.

It is an arithmetic number, because the mean of its divisors is an integer number (34965909).

Almost surely, 2^139059649 is an apocalyptic number.

It is an amenable number.

139059649 is a deficient number, since it is larger than the sum of its proper divisors (803987).

139059649 is an equidigital number, since it uses as much as digits as its factorization.

139059649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803986.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 139059649 is about 11792.3555322929. The cubic root of 139059649 is about 518.0842339525.

The spelling of 139059649 in words is "one hundred thirty-nine million, fifty-nine thousand, six hundred forty-nine".