27980133 has 4 divisors (see below), whose sum is σ = 37306848. Its totient is φ = 18653420.

The previous prime is 27980129. The next prime is 27980137. The reversal of 27980133 is 33108972.

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 an interprime number because it is at equal distance from previous prime (27980129) and next prime (27980137).

It is a cyclic number.

It is not a de Polignac number, because 27980133 - 2² = 27980129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27980094 and 27980103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980137) 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, 4663353 + ... + 4663358.

It is an arithmetic number, because the mean of its divisors is an integer number (9326712).

Almost surely, 2^27980133 is an apocalyptic number.

It is an amenable number.

27980133 is a deficient number, since it is larger than the sum of its proper divisors (9326715).

27980133 is an equidigital number, since it uses as much as digits as its factorization.

27980133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9326714.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 27980133 is about 5289.6250339698. The cubic root of 27980133 is about 303.5870612507.

The spelling of 27980133 in words is "twenty-seven million, nine hundred eighty thousand, one hundred thirty-three".