240506813 has 2 divisors, whose sum is σ = 240506814. Its totient is φ = 240506812.

The previous prime is 240506797. The next prime is 240506843. The reversal of 240506813 is 318605042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199007449 + 41499364 = 14107^2 + 6442^2 .

It is a cyclic number.

It is not a de Polignac number, because 240506813 - 2⁴ = 240506797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240506843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120253406 + 120253407.

It is an arithmetic number, because the mean of its divisors is an integer number (120253407).

Almost surely, 2^240506813 is an apocalyptic number.

It is an amenable number.

240506813 is a deficient number, since it is larger than the sum of its proper divisors (1).

240506813 is an equidigital number, since it uses as much as digits as its factorization.

240506813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 240506813 is about 15508.2820776513. The cubic root of 240506813 is about 621.8836341419.

The spelling of 240506813 in words is "two hundred forty million, five hundred six thousand, eight hundred thirteen".