27971913 has 8 divisors (see below), whose sum is σ = 37745568. Its totient is φ = 18423104.

The previous prime is 27971893. The next prime is 27971917. The reversal of 27971913 is 31917972.

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 27971913 - 2¹³ = 27963721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27971917) 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, 55920 + ... + 56417.

It is an arithmetic number, because the mean of its divisors is an integer number (4718196).

Almost surely, 2^27971913 is an apocalyptic number.

It is an amenable number.

27971913 is a deficient number, since it is larger than the sum of its proper divisors (9773655).

27971913 is a wasteful number, since it uses less digits than its factorization.

27971913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112423.

The product of its digits is 23814, while the sum is 39.

The square root of 27971913 is about 5288.8479842022. The cubic root of 27971913 is about 303.5573290825.

The spelling of 27971913 in words is "twenty-seven million, nine hundred seventy-one thousand, nine hundred thirteen".