126319399 has 4 divisors (see below), whose sum is σ = 126506664. Its totient is φ = 126132136.

The previous prime is 126319393. The next prime is 126319421. The reversal of 126319399 is 993913621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126319399 - 2⁹ = 126318887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126319393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92617 + ... + 93970.

It is an arithmetic number, because the mean of its divisors is an integer number (31626666).

Almost surely, 2^126319399 is an apocalyptic number.

126319399 is a deficient number, since it is larger than the sum of its proper divisors (187265).

126319399 is an equidigital number, since it uses as much as digits as its factorization.

126319399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187264.

The product of its digits is 78732, while the sum is 43.

The square root of 126319399 is about 11239.1903178120. The cubic root of 126319399 is about 501.7530451489.

The spelling of 126319399 in words is "one hundred twenty-six million, three hundred nineteen thousand, three hundred ninety-nine".