99740243 has 2 divisors, whose sum is σ = 99740244. Its totient is φ = 99740242.

The previous prime is 99740239. The next prime is 99740269. The reversal of 99740243 is 34204799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99740243 - 2² = 99740239 is a prime.

It is equal to p_5747348 and since 99740243 and 5747348 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 99740197 and 99740206.

It is not a weakly prime, because it can be changed into another prime (99740203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49870121 + 49870122.

It is an arithmetic number, because the mean of its divisors is an integer number (49870122).

Almost surely, 2^99740243 is an apocalyptic number.

99740243 is a deficient number, since it is larger than the sum of its proper divisors (1).

99740243 is an equidigital number, since it uses as much as digits as its factorization.

99740243 is an evil number, because the sum of its binary digits is even.

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

The square root of 99740243 is about 9987.0037048156. The cubic root of 99740243 is about 463.7566398112.

The spelling of 99740243 in words is "ninety-nine million, seven hundred forty thousand, two hundred forty-three".