126391393 has 4 divisors (see below), whose sum is σ = 128533680. Its totient is φ = 124249108.

The previous prime is 126391381. The next prime is 126391409. The reversal of 126391393 is 393193621.

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 a de Polignac number, because none of the positive numbers 2^k-126391393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126391093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071055 + ... + 1071172.

It is an arithmetic number, because the mean of its divisors is an integer number (32133420).

Almost surely, 2^126391393 is an apocalyptic number.

It is an amenable number.

126391393 is a deficient number, since it is larger than the sum of its proper divisors (2142287).

126391393 is an equidigital number, since it uses as much as digits as its factorization.

126391393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142286.

The product of its digits is 26244, while the sum is 37.

The square root of 126391393 is about 11242.3926723807. The cubic root of 126391393 is about 501.8483494557.

The spelling of 126391393 in words is "one hundred twenty-six million, three hundred ninety-one thousand, three hundred ninety-three".