126173393 has 4 divisors (see below), whose sum is σ = 126259620. Its totient is φ = 126087168.

The previous prime is 126173389. The next prime is 126173401. The reversal of 126173393 is 393371621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393371621 = 6871 ⋅57251.

It can be written as a sum of positive squares in 2 ways, for example, as 60109009 + 66064384 = 7753^2 + 8128^2 .

It is a cyclic number.

It is not a de Polignac number, because 126173393 - 2² = 126173389 is a prime.

It is a super-2 number, since 2×126173393² = 31839450202264898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126173323) 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, 40880 + ... + 43857.

It is an arithmetic number, because the mean of its divisors is an integer number (31564905).

Almost surely, 2^126173393 is an apocalyptic number.

It is an amenable number.

126173393 is a deficient number, since it is larger than the sum of its proper divisors (86227).

126173393 is an equidigital number, since it uses as much as digits as its factorization.

126173393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86226.

The product of its digits is 20412, while the sum is 35.

The square root of 126173393 is about 11232.6930430774. The cubic root of 126173393 is about 501.5596539009.

The spelling of 126173393 in words is "one hundred twenty-six million, one hundred seventy-three thousand, three hundred ninety-three".