27298639 has 4 divisors (see below), whose sum is σ = 27340600. Its totient is φ = 27256680.

The previous prime is 27298633. The next prime is 27298699. The reversal of 27298639 is 93689272.

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-27298639 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 (27298633) 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, 19989 + ... + 21310.

It is an arithmetic number, because the mean of its divisors is an integer number (6835150).

Almost surely, 2^27298639 is an apocalyptic number.

27298639 is a deficient number, since it is larger than the sum of its proper divisors (41961).

27298639 is an equidigital number, since it uses as much as digits as its factorization.

27298639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41960.

The product of its digits is 326592, while the sum is 46.

The square root of 27298639 is about 5224.8099486967. The cubic root of 27298639 is about 301.1020172733.

The spelling of 27298639 in words is "twenty-seven million, two hundred ninety-eight thousand, six hundred thirty-nine".