27953161 has 4 divisors (see below), whose sum is σ = 29424400. Its totient is φ = 26481924.

The previous prime is 27953099. The next prime is 27953171. The reversal of 27953161 is 16135972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27953161 - 2¹⁷ = 27822089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27953171) 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, 735591 + ... + 735628.

It is an arithmetic number, because the mean of its divisors is an integer number (7356100).

Almost surely, 2^27953161 is an apocalyptic number.

It is an amenable number.

27953161 is a deficient number, since it is larger than the sum of its proper divisors (1471239).

27953161 is a wasteful number, since it uses less digits than its factorization.

27953161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471238.

The product of its digits is 11340, while the sum is 34.

The square root of 27953161 is about 5287.0749001693. The cubic root of 27953161 is about 303.4894803143.

The spelling of 27953161 in words is "twenty-seven million, nine hundred fifty-three thousand, one hundred sixty-one".