126189899 has 8 divisors (see below), whose sum is σ = 138653760. Its totient is φ = 113891400.

The previous prime is 126189893. The next prime is 126189901. The reversal of 126189899 is 998981621.

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-126189899 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 126189899.

It is not an unprimeable number, because it can be changed into a prime (126189893) 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, 39737 + ... + 42794.

It is an arithmetic number, because the mean of its divisors is an integer number (17331720).

Almost surely, 2^126189899 is an apocalyptic number.

126189899 is a deficient number, since it is larger than the sum of its proper divisors (12463861).

126189899 is a wasteful number, since it uses less digits than its factorization.

126189899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82681.

The product of its digits is 559872, while the sum is 53.

The square root of 126189899 is about 11233.4277493559. The cubic root of 126189899 is about 501.5815242875.

The spelling of 126189899 in words is "one hundred twenty-six million, one hundred eighty-nine thousand, eight hundred ninety-nine".