126836813 has 4 divisors (see below), whose sum is σ = 134297820. Its totient is φ = 119375808.

The previous prime is 126836803. The next prime is 126836819. The reversal of 126836813 is 318638621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101566084 + 25270729 = 10078^2 + 5027^2 .

It is a cyclic number.

It is not a de Polignac number, because 126836813 - 2¹⁶ = 126771277 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 (126836819) 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, 3730478 + ... + 3730511.

It is an arithmetic number, because the mean of its divisors is an integer number (33574455).

Almost surely, 2^126836813 is an apocalyptic number.

It is an amenable number.

126836813 is a deficient number, since it is larger than the sum of its proper divisors (7461007).

126836813 is an equidigital number, since it uses as much as digits as its factorization.

126836813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7461006.

The product of its digits is 41472, while the sum is 38.

The square root of 126836813 is about 11262.1850899370. The cubic root of 126836813 is about 502.4371849569.

The spelling of 126836813 in words is "one hundred twenty-six million, eight hundred thirty-six thousand, eight hundred thirteen".