298206721 has 2 divisors, whose sum is σ = 298206722. Its totient is φ = 298206720.

The previous prime is 298206683. The next prime is 298206737. The reversal of 298206721 is 127602892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164480625 + 133726096 = 12825^2 + 11564^2 .

It is a cyclic number.

It is not a de Polignac number, because 298206721 - 2¹⁷ = 298075649 is a prime.

It is not a weakly prime, because it can be changed into another prime (298206761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149103360 + 149103361.

It is an arithmetic number, because the mean of its divisors is an integer number (149103361).

Almost surely, 2^298206721 is an apocalyptic number.

It is an amenable number.

298206721 is a deficient number, since it is larger than the sum of its proper divisors (1).

298206721 is an equidigital number, since it uses as much as digits as its factorization.

298206721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 298206721 is about 17268.6629766175. The cubic root of 298206721 is about 668.0964167246.

The spelling of 298206721 in words is "two hundred ninety-eight million, two hundred six thousand, seven hundred twenty-one".