139525829 has 8 divisors (see below), whose sum is σ = 143178840. Its totient is φ = 135884800.

The previous prime is 139525819. The next prime is 139525847. The reversal of 139525829 is 928525931.

139525829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49729 + 139476100 = 223^2 + 11810^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139525829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139525829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139525819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23627 + ... + 28935.

It is an arithmetic number, because the mean of its divisors is an integer number (17897355).

Almost surely, 2^139525829 is an apocalyptic number.

It is an amenable number.

139525829 is a deficient number, since it is larger than the sum of its proper divisors (3653011).

139525829 is an equidigital number, since it uses as much as digits as its factorization.

139525829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991.

The product of its digits is 194400, while the sum is 44.

The square root of 139525829 is about 11812.1051891693. The cubic root of 139525829 is about 518.6625256482.

The spelling of 139525829 in words is "one hundred thirty-nine million, five hundred twenty-five thousand, eight hundred twenty-nine".