126233989 has 4 divisors (see below), whose sum is σ = 144267424. Its totient is φ = 108200556.

The previous prime is 126233983. The next prime is 126234029. The reversal of 126233989 is 989332621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126233989 - 2¹⁵ = 126201221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126233983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9016707 + ... + 9016720.

It is an arithmetic number, because the mean of its divisors is an integer number (36066856).

Almost surely, 2^126233989 is an apocalyptic number.

It is an amenable number.

126233989 is a deficient number, since it is larger than the sum of its proper divisors (18033435).

126233989 is an equidigital number, since it uses as much as digits as its factorization.

126233989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18033434.

The product of its digits is 139968, while the sum is 43.

The square root of 126233989 is about 11235.3900243828. The cubic root of 126233989 is about 501.6399340189.

The spelling of 126233989 in words is "one hundred twenty-six million, two hundred thirty-three thousand, nine hundred eighty-nine".