27968951 has 2 divisors, whose sum is σ = 27968952. Its totient is φ = 27968950.

The previous prime is 27968947. The next prime is 27968953. The reversal of 27968951 is 15986972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27968951 - 2² = 27968947 is a prime.

Together with 27968953, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27968896 and 27968905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27968953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13984475 + 13984476.

It is an arithmetic number, because the mean of its divisors is an integer number (13984476).

Almost surely, 2^27968951 is an apocalyptic number.

27968951 is a deficient number, since it is larger than the sum of its proper divisors (1).

27968951 is an equidigital number, since it uses as much as digits as its factorization.

27968951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 27968951 is about 5288.5679536147. The cubic root of 27968951 is about 303.5466139466.

The spelling of 27968951 in words is "twenty-seven million, nine hundred sixty-eight thousand, nine hundred fifty-one".