243202997 has 2 divisors, whose sum is σ = 243202998. Its totient is φ = 243202996.

The previous prime is 243202991. The next prime is 243203017. The reversal of 243202997 is 799202342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233753521 + 9449476 = 15289^2 + 3074^2 .

It is a cyclic number.

It is not a de Polignac number, because 243202997 - 2²⁶ = 176094133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243202997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243202991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121601498 + 121601499.

It is an arithmetic number, because the mean of its divisors is an integer number (121601499).

Almost surely, 2^243202997 is an apocalyptic number.

It is an amenable number.

243202997 is a deficient number, since it is larger than the sum of its proper divisors (1).

243202997 is an equidigital number, since it uses as much as digits as its factorization.

243202997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 243202997 is about 15594.9670406833. The cubic root of 243202997 is about 624.1988643027.

The spelling of 243202997 in words is "two hundred forty-three million, two hundred two thousand, nine hundred ninety-seven".