126863791 has 4 divisors (see below), whose sum is σ = 132379632. Its totient is φ = 121347952.

The previous prime is 126863783. The next prime is 126863797. The reversal of 126863791 is 197368621.

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 126863791 - 2³ = 126863783 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 (126863797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2757886 + ... + 2757931.

It is an arithmetic number, because the mean of its divisors is an integer number (33094908).

Almost surely, 2^126863791 is an apocalyptic number.

126863791 is a deficient number, since it is larger than the sum of its proper divisors (5515841).

126863791 is an equidigital number, since it uses as much as digits as its factorization.

126863791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515840.

The product of its digits is 108864, while the sum is 43.

The square root of 126863791 is about 11263.3827511987. The cubic root of 126863791 is about 502.4728049769.

The spelling of 126863791 in words is "one hundred twenty-six million, eight hundred sixty-three thousand, seven hundred ninety-one".