27121399 has 8 divisors (see below), whose sum is σ = 27613440. Its totient is φ = 26632056.

The previous prime is 27121321. The next prime is 27121403. The reversal of 27121399 is 99312172.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27121399 - 2¹⁵ = 27088631 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 (27121309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37362 + ... + 38080.

It is an arithmetic number, because the mean of its divisors is an integer number (3451680).

Almost surely, 2^27121399 is an apocalyptic number.

27121399 is a deficient number, since it is larger than the sum of its proper divisors (492041).

27121399 is an equidigital number, since it uses as much as digits as its factorization.

27121399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its digits is 6804, while the sum is 34.

The square root of 27121399 is about 5207.8209454627. The cubic root of 27121399 is about 300.4489537259.

The spelling of 27121399 in words is "twenty-seven million, one hundred twenty-one thousand, three hundred ninety-nine".