298640863 has 2 divisors, whose sum is σ = 298640864. Its totient is φ = 298640862.

The previous prime is 298640861. The next prime is 298640873. The reversal of 298640863 is 368046892.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 298640863 - 2¹ = 298640861 is a prime.

Together with 298640861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298640861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149320431 + 149320432.

It is an arithmetic number, because the mean of its divisors is an integer number (149320432).

Almost surely, 2^298640863 is an apocalyptic number.

298640863 is a deficient number, since it is larger than the sum of its proper divisors (1).

298640863 is an equidigital number, since it uses as much as digits as its factorization.

298640863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 298640863 is about 17281.2286310899. The cubic root of 298640863 is about 668.4204738890.

The spelling of 298640863 in words is "two hundred ninety-eight million, six hundred forty thousand, eight hundred sixty-three".