126191839 has 2 divisors, whose sum is σ = 126191840. Its totient is φ = 126191838.

The previous prime is 126191837. The next prime is 126191881. The reversal of 126191839 is 938191621.

It is a weak prime.

It is an emirp because it is prime and its reverse (938191621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126191839 - 2¹ = 126191837 is a prime.

Together with 126191837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126191831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63095919 + 63095920.

It is an arithmetic number, because the mean of its divisors is an integer number (63095920).

Almost surely, 2^126191839 is an apocalyptic number.

126191839 is a deficient number, since it is larger than the sum of its proper divisors (1).

126191839 is an equidigital number, since it uses as much as digits as its factorization.

126191839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 126191839 is about 11233.5140984467. The cubic root of 126191839 is about 501.5840946548.

The spelling of 126191839 in words is "one hundred twenty-six million, one hundred ninety-one thousand, eight hundred thirty-nine".