126389001389 has 4 divisors (see below), whose sum is σ = 144444573024. Its totient is φ = 108333429756.

The previous prime is 126389001373. The next prime is 126389001413. The reversal of 126389001389 is 983100983621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 983100983621 = 23 ⋅42743521027.

It is a cyclic number.

It is not a de Polignac number, because 126389001389 - 2⁴ = 126389001373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126389006389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9027785807 + ... + 9027785820.

It is an arithmetic number, because the mean of its divisors is an integer number (36111143256).

Almost surely, 2^126389001389 is an apocalyptic number.

It is an amenable number.

126389001389 is a deficient number, since it is larger than the sum of its proper divisors (18055571635).

126389001389 is an equidigital number, since it uses as much as digits as its factorization.

126389001389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055571634.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 126389001389 in words is "one hundred twenty-six billion, three hundred eighty-nine million, one thousand, three hundred eighty-nine".