27829997 has 4 divisors (see below), whose sum is σ = 29970780. Its totient is φ = 25689216.

The previous prime is 27829943. The next prime is 27829999. The reversal of 27829997 is 79992872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18913801 + 8916196 = 4349^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 27829997 - 2⁸ = 27829741 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 (27829999) 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, 1070372 + ... + 1070397.

It is an arithmetic number, because the mean of its divisors is an integer number (7492695).

Almost surely, 2^27829997 is an apocalyptic number.

It is an amenable number.

27829997 is a deficient number, since it is larger than the sum of its proper divisors (2140783).

27829997 is a wasteful number, since it uses less digits than its factorization.

27829997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140782.

The product of its digits is 1143072, while the sum is 53.

The square root of 27829997 is about 5275.4143913061. The cubic root of 27829997 is about 303.0430905906.

The spelling of 27829997 in words is "twenty-seven million, eight hundred twenty-nine thousand, nine hundred ninety-seven".