298639679 has 4 divisors (see below), whose sum is σ = 321611976. Its totient is φ = 275667384.

The previous prime is 298639673. The next prime is 298639681. The reversal of 298639679 is 976936892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-298639679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298639673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11486129 + ... + 11486154.

It is an arithmetic number, because the mean of its divisors is an integer number (80402994).

Almost surely, 2^298639679 is an apocalyptic number.

298639679 is a deficient number, since it is larger than the sum of its proper divisors (22972297).

298639679 is a wasteful number, since it uses less digits than its factorization.

298639679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22972296.

The product of its digits is 8817984, while the sum is 59.

The square root of 298639679 is about 17281.1943742324. The cubic root of 298639679 is about 668.4195905416.

The spelling of 298639679 in words is "two hundred ninety-eight million, six hundred thirty-nine thousand, six hundred seventy-nine".