27929131 has 4 divisors (see below), whose sum is σ = 28130200. Its totient is φ = 27728064.

The previous prime is 27929129. The next prime is 27929137. The reversal of 27929131 is 13192972.

It is a happy number.

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 27929131 - 2¹ = 27929129 is a prime.

It is a super-2 number, since 2×27929131² = 1560072716830322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27929137) 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, 100326 + ... + 100603.

It is an arithmetic number, because the mean of its divisors is an integer number (7032550).

Almost surely, 2^27929131 is an apocalyptic number.

27929131 is a deficient number, since it is larger than the sum of its proper divisors (201069).

27929131 is a wasteful number, since it uses less digits than its factorization.

27929131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201068.

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

The square root of 27929131 is about 5284.8018884344. The cubic root of 27929131 is about 303.4024902361.

The spelling of 27929131 in words is "twenty-seven million, nine hundred twenty-nine thousand, one hundred thirty-one".