298429721 has 2 divisors, whose sum is σ = 298429722. Its totient is φ = 298429720.

The previous prime is 298429717. The next prime is 298429739. The reversal of 298429721 is 127924892.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298425625 + 4096 = 17275^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 298429721 - 2² = 298429717 is a prime.

It is a super-2 number, since 2×298429721² = 178120596752275682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (298429121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149214860 + 149214861.

It is an arithmetic number, because the mean of its divisors is an integer number (149214861).

Almost surely, 2^298429721 is an apocalyptic number.

It is an amenable number.

298429721 is a deficient number, since it is larger than the sum of its proper divisors (1).

298429721 is an equidigital number, since it uses as much as digits as its factorization.

298429721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 298429721 is about 17275.1185524152. The cubic root of 298429721 is about 668.2629101541.

The spelling of 298429721 in words is "two hundred ninety-eight million, four hundred twenty-nine thousand, seven hundred twenty-one".