27964687 has 2 divisors, whose sum is σ = 27964688. Its totient is φ = 27964686.

The previous prime is 27964679. The next prime is 27964691. The reversal of 27964687 is 78646972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27964687 - 2³ = 27964679 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27964687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27964487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13982343 + 13982344.

It is an arithmetic number, because the mean of its divisors is an integer number (13982344).

Almost surely, 2^27964687 is an apocalyptic number.

27964687 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964687 is an equidigital number, since it uses as much as digits as its factorization.

27964687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 27964687 is about 5288.1648045423. The cubic root of 27964687 is about 303.5311874529.

The spelling of 27964687 in words is "twenty-seven million, nine hundred sixty-four thousand, six hundred eighty-seven".