818247401 has 2 divisors, whose sum is σ = 818247402. Its totient is φ = 818247400.

The previous prime is 818247377. The next prime is 818247421. The reversal of 818247401 is 104742818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783720025 + 34527376 = 27995^2 + 5876^2 .

It is a cyclic number.

It is not a de Polignac number, because 818247401 - 2¹⁸ = 817985257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (818247421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409123700 + 409123701.

It is an arithmetic number, because the mean of its divisors is an integer number (409123701).

Almost surely, 2^818247401 is an apocalyptic number.

It is an amenable number.

818247401 is a deficient number, since it is larger than the sum of its proper divisors (1).

818247401 is an equidigital number, since it uses as much as digits as its factorization.

818247401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 818247401 is about 28605.0240517291. The cubic root of 818247401 is about 935.3228511322.

The spelling of 818247401 in words is "eight hundred eighteen million, two hundred forty-seven thousand, four hundred one".