297749993 has 2 divisors, whose sum is σ = 297749994. Its totient is φ = 297749992.

The previous prime is 297749983. The next prime is 297749999. The reversal of 297749993 is 399947792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174028864 + 123721129 = 13192^2 + 11123^2 .

It is a cyclic number.

It is not a de Polignac number, because 297749993 - 2⁸ = 297749737 is a prime.

It is not a weakly prime, because it can be changed into another prime (297749999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148874996 + 148874997.

It is an arithmetic number, because the mean of its divisors is an integer number (148874997).

Almost surely, 2^297749993 is an apocalyptic number.

It is an amenable number.

297749993 is a deficient number, since it is larger than the sum of its proper divisors (1).

297749993 is an equidigital number, since it uses as much as digits as its factorization.

297749993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7715736, while the sum is 59.

The square root of 297749993 is about 17255.4337239027. The cubic root of 297749993 is about 667.7551609973.

The spelling of 297749993 in words is "two hundred ninety-seven million, seven hundred forty-nine thousand, nine hundred ninety-three".