126249891839 has 2 divisors, whose sum is σ = 126249891840. Its totient is φ = 126249891838.

The previous prime is 126249891799. The next prime is 126249891841. The reversal of 126249891839 is 938198942621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126249891839 - 2³² = 121954924543 is a prime.

Together with 126249891841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126242891839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63124945919 + 63124945920.

It is an arithmetic number, because the mean of its divisors is an integer number (63124945920).

Almost surely, 2^126249891839 is an apocalyptic number.

126249891839 is a deficient number, since it is larger than the sum of its proper divisors (1).

126249891839 is an equidigital number, since it uses as much as digits as its factorization.

126249891839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 62.

The spelling of 126249891839 in words is "one hundred twenty-six billion, two hundred forty-nine million, eight hundred ninety-one thousand, eight hundred thirty-nine".