27921159 has 32 divisors (see below), whose sum is σ = 47792640. Its totient is φ = 15780096.

The previous prime is 27921151. The next prime is 27921167. The reversal of 27921159 is 95112972.

It is an interprime number because it is at equal distance from previous prime (27921151) and next prime (27921167).

It is not a de Polignac number, because 27921159 - 2³ = 27921151 is a prime.

It is a super-2 number, since 2×27921159² = 1559182239806562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27921151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17572 + ... + 19094.

It is an arithmetic number, because the mean of its divisors is an integer number (1493520).

Almost surely, 2^27921159 is an apocalyptic number.

27921159 is a deficient number, since it is larger than the sum of its proper divisors (19871481).

27921159 is a wasteful number, since it uses less digits than its factorization.

27921159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1630 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 27921159 is about 5284.0475963034. The cubic root of 27921159 is about 303.3736200835.

The spelling of 27921159 in words is "twenty-seven million, nine hundred twenty-one thousand, one hundred fifty-nine".