243437801 has 2 divisors, whose sum is σ = 243437802. Its totient is φ = 243437800.

The previous prime is 243437783. The next prime is 243437879. The reversal of 243437801 is 108734342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149328400 + 94109401 = 12220^2 + 9701^2 .

It is a cyclic number.

It is not a de Polignac number, because 243437801 - 2¹⁴ = 243421417 is a prime.

It is not a weakly prime, because it can be changed into another prime (243427801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121718900 + 121718901.

It is an arithmetic number, because the mean of its divisors is an integer number (121718901).

Almost surely, 2^243437801 is an apocalyptic number.

It is an amenable number.

243437801 is a deficient number, since it is larger than the sum of its proper divisors (1).

243437801 is an equidigital number, since it uses as much as digits as its factorization.

243437801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 243437801 is about 15602.4934225271. The cubic root of 243437801 is about 624.3996804242.

The spelling of 243437801 in words is "two hundred forty-three million, four hundred thirty-seven thousand, eight hundred one".