27931193 has 2 divisors, whose sum is σ = 27931194. Its totient is φ = 27931192.

The previous prime is 27931171. The next prime is 27931199. The reversal of 27931193 is 39113972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15342889 + 12588304 = 3917^2 + 3548^2 .

It is a cyclic number.

It is not a de Polignac number, because 27931193 - 2⁸ = 27930937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27931199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13965596 + 13965597.

It is an arithmetic number, because the mean of its divisors is an integer number (13965597).

Almost surely, 2^27931193 is an apocalyptic number.

It is an amenable number.

27931193 is a deficient number, since it is larger than the sum of its proper divisors (1).

27931193 is an equidigital number, since it uses as much as digits as its factorization.

27931193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 27931193 is about 5284.9969725630. The cubic root of 27931193 is about 303.4099567596.

The spelling of 27931193 in words is "twenty-seven million, nine hundred thirty-one thousand, one hundred ninety-three".