139626829 has 4 divisors (see below), whose sum is σ = 139691484. Its totient is φ = 139562176.

The previous prime is 139626827. The next prime is 139626841. The reversal of 139626829 is 928626931.

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 43626025 + 96000804 = 6605^2 + 9798^2 .

It is a cyclic number.

It is not a de Polignac number, because 139626829 - 2¹ = 139626827 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 (139626827) 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, 28972 + ... + 33445.

It is an arithmetic number, because the mean of its divisors is an integer number (34922871).

Almost surely, 2^139626829 is an apocalyptic number.

It is an amenable number.

139626829 is a deficient number, since it is larger than the sum of its proper divisors (64655).

139626829 is an equidigital number, since it uses as much as digits as its factorization.

139626829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64654.

The product of its digits is 279936, while the sum is 46.

The square root of 139626829 is about 11816.3796909206. The cubic root of 139626829 is about 518.7876453253.

The spelling of 139626829 in words is "one hundred thirty-nine million, six hundred twenty-six thousand, eight hundred twenty-nine".