27956651 has 2 divisors, whose sum is σ = 27956652. Its totient is φ = 27956650.

The previous prime is 27956611. The next prime is 27956659. The reversal of 27956651 is 15665972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27956651 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 27956599 and 27956608.

It is not a weakly prime, because it can be changed into another prime (27956659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13978325 + 13978326.

It is an arithmetic number, because the mean of its divisors is an integer number (13978326).

Almost surely, 2^27956651 is an apocalyptic number.

27956651 is a deficient number, since it is larger than the sum of its proper divisors (1).

27956651 is an equidigital number, since it uses as much as digits as its factorization.

27956651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 27956651 is about 5287.4049400438. The cubic root of 27956651 is about 303.5021101824.

The spelling of 27956651 in words is "twenty-seven million, nine hundred fifty-six thousand, six hundred fifty-one".