27905963 has 2 divisors, whose sum is σ = 27905964.
Its totient is φ = 27905962.
The previous prime is 27905903. The next prime is 27905971. The reversal of 27905963 is 36950972.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 27905963 - 222 = 23711659 is a prime.
It is a Sophie Germain prime.
It is a self number, because there is not a number n which added to its sum of digits gives 27905963.
It is not a weakly prime, because it can be changed into another prime (27905903) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13952981 + 13952982.
It is an arithmetic number, because the mean of its divisors is an integer number (13952982).
Almost surely, 227905963 is an apocalyptic number.
27905963 is a deficient number, since it is larger than the sum of its proper divisors (1).
27905963 is an equidigital number, since it uses as much as digits as its factorization.
27905963 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 102060, while the sum is 41.
The square root of 27905963 is about 5282.6094877437.
The cubic root of 27905963 is about 303.3185733939.
The spelling of 27905963 in words is "twenty-seven million, nine hundred five thousand, nine hundred sixty-three".