27969161 has 8 divisors (see below), whose sum is σ = 31496448. Its totient is φ = 24606000.

The previous prime is 27969157. The next prime is 27969167. The reversal of 27969161 is 16196972.

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 27969161 - 2² = 27969157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27969167) 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, 40670 + ... + 41351.

It is an arithmetic number, because the mean of its divisors is an integer number (3937056).

Almost surely, 2^27969161 is an apocalyptic number.

It is an amenable number.

27969161 is a deficient number, since it is larger than the sum of its proper divisors (3527287).

27969161 is a wasteful number, since it uses less digits than its factorization.

27969161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82063.

The product of its digits is 40824, while the sum is 41.

The square root of 27969161 is about 5288.5878077233. The cubic root of 27969161 is about 303.5473736537.

The spelling of 27969161 in words is "twenty-seven million, nine hundred sixty-nine thousand, one hundred sixty-one".