236494813 has 2 divisors, whose sum is σ = 236494814. Its totient is φ = 236494812.

The previous prime is 236494807. The next prime is 236494829. The reversal of 236494813 is 318494632.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207302404 + 29192409 = 14398^2 + 5403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-236494813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (236494213) 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 as a sum of consecutive naturals, namely, 118247406 + 118247407.

It is an arithmetic number, because the mean of its divisors is an integer number (118247407).

Almost surely, 2^236494813 is an apocalyptic number.

It is an amenable number.

236494813 is a deficient number, since it is larger than the sum of its proper divisors (1).

236494813 is an equidigital number, since it uses as much as digits as its factorization.

236494813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 236494813 is about 15378.3878543884. The cubic root of 236494813 is about 618.4062544240.

The spelling of 236494813 in words is "two hundred thirty-six million, four hundred ninety-four thousand, eight hundred thirteen".