126189829 has 4 divisors (see below), whose sum is σ = 126269676. Its totient is φ = 126109984.

The previous prime is 126189823. The next prime is 126189839. The reversal of 126189829 is 928981621.

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 29953729 + 96236100 = 5473^2 + 9810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126189829 is a prime.

It is a super-3 number, since 3×126189829³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126189823) 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, 37504 + ... + 40729.

It is an arithmetic number, because the mean of its divisors is an integer number (31567419).

Almost surely, 2^126189829 is an apocalyptic number.

It is an amenable number.

126189829 is a deficient number, since it is larger than the sum of its proper divisors (79847).

126189829 is an equidigital number, since it uses as much as digits as its factorization.

126189829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79846.

The product of its digits is 124416, while the sum is 46.

The square root of 126189829 is about 11233.4246336547. The cubic root of 126189829 is about 501.5814315418.

The spelling of 126189829 in words is "one hundred twenty-six million, one hundred eighty-nine thousand, eight hundred twenty-nine".