27916961 has 2 divisors, whose sum is σ = 27916962. Its totient is φ = 27916960.

The previous prime is 27916951. The next prime is 27916979. The reversal of 27916961 is 16961972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14776336 + 13140625 = 3844^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 27916961 - 2¹⁴ = 27900577 is a prime.

It is a super-2 number, since 2×27916961² = 1558713422951042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27916921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13958480 + 13958481.

It is an arithmetic number, because the mean of its divisors is an integer number (13958481).

Almost surely, 2^27916961 is an apocalyptic number.

It is an amenable number.

27916961 is a deficient number, since it is larger than the sum of its proper divisors (1).

27916961 is an equidigital number, since it uses as much as digits as its factorization.

27916961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 27916961 is about 5283.6503480075. The cubic root of 27916961 is about 303.3584150522.

The spelling of 27916961 in words is "twenty-seven million, nine hundred sixteen thousand, nine hundred sixty-one".