246945821 has 2 divisors, whose sum is σ = 246945822. Its totient is φ = 246945820.

The previous prime is 246945781. The next prime is 246945827. The reversal of 246945821 is 128549642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204890596 + 42055225 = 14314^2 + 6485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-246945821 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 (246945827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123472910 + 123472911.

It is an arithmetic number, because the mean of its divisors is an integer number (123472911).

Almost surely, 2^246945821 is an apocalyptic number.

It is an amenable number.

246945821 is a deficient number, since it is larger than the sum of its proper divisors (1).

246945821 is an equidigital number, since it uses as much as digits as its factorization.

246945821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 246945821 is about 15714.5098873621. The cubic root of 246945821 is about 627.3846571382.

The spelling of 246945821 in words is "two hundred forty-six million, nine hundred forty-five thousand, eight hundred twenty-one".