27973389 has 4 divisors (see below), whose sum is σ = 37297856. Its totient is φ = 18648924.

The previous prime is 27973327. The next prime is 27973403. The reversal of 27973389 is 98337972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27973389 - 2⁸ = 27973133 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 (27973289) 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, 4662229 + ... + 4662234.

It is an arithmetic number, because the mean of its divisors is an integer number (9324464).

Almost surely, 2^27973389 is an apocalyptic number.

It is an amenable number.

27973389 is a deficient number, since it is larger than the sum of its proper divisors (9324467).

27973389 is an equidigital number, since it uses as much as digits as its factorization.

27973389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324466.

The product of its digits is 571536, while the sum is 48.

The square root of 27973389 is about 5288.9875212558. The cubic root of 27973389 is about 303.5626682804.

The spelling of 27973389 in words is "twenty-seven million, nine hundred seventy-three thousand, three hundred eighty-nine".