297728723 has 2 divisors, whose sum is σ = 297728724. Its totient is φ = 297728722.

The previous prime is 297728647. The next prime is 297728729. The reversal of 297728723 is 327827792.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 297728723 - 2⁸ = 297728467 is a prime.

It is not a weakly prime, because it can be changed into another prime (297728729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148864361 + 148864362.

It is an arithmetic number, because the mean of its divisors is an integer number (148864362).

Almost surely, 2^297728723 is an apocalyptic number.

297728723 is a deficient number, since it is larger than the sum of its proper divisors (1).

297728723 is an equidigital number, since it uses as much as digits as its factorization.

297728723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 297728723 is about 17254.8173852985. The cubic root of 297728723 is about 667.7392600840.

The spelling of 297728723 in words is "two hundred ninety-seven million, seven hundred twenty-eight thousand, seven hundred twenty-three".