27409993 has 4 divisors (see below), whose sum is σ = 29518468. Its totient is φ = 25301520.

The previous prime is 27409937. The next prime is 27409999. The reversal of 27409993 is 39990472.

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 7767369 + 19642624 = 2787^2 + 4432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27409993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27409999) 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, 1054218 + ... + 1054243.

It is an arithmetic number, because the mean of its divisors is an integer number (7379617).

Almost surely, 2^27409993 is an apocalyptic number.

It is an amenable number.

27409993 is a deficient number, since it is larger than the sum of its proper divisors (2108475).

27409993 is a wasteful number, since it uses less digits than its factorization.

27409993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108474.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 27409993 is about 5235.4553765647. The cubic root of 27409993 is about 301.5108707178.

The spelling of 27409993 in words is "twenty-seven million, four hundred nine thousand, nine hundred ninety-three".