27398131 has 4 divisors (see below), whose sum is σ = 27649600. Its totient is φ = 27146664.

The previous prime is 27398113. The next prime is 27398143. The reversal of 27398131 is 13189372.

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

It is a cyclic number.

It is not a de Polignac number, because 27398131 - 2⁹ = 27397619 is a prime.

It is a super-2 number, since 2×27398131² = 1501315164586322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27398431) 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, 125571 + ... + 125788.

It is an arithmetic number, because the mean of its divisors is an integer number (6912400).

Almost surely, 2^27398131 is an apocalyptic number.

27398131 is a deficient number, since it is larger than the sum of its proper divisors (251469).

27398131 is a wasteful number, since it uses less digits than its factorization.

27398131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251468.

The product of its digits is 9072, while the sum is 34.

The square root of 27398131 is about 5234.3224012283. The cubic root of 27398131 is about 301.4673703053.

The spelling of 27398131 in words is "twenty-seven million, three hundred ninety-eight thousand, one hundred thirty-one".