27906899 has 2 divisors, whose sum is σ = 27906900. Its totient is φ = 27906898.

The previous prime is 27906887. The next prime is 27906947. The reversal of 27906899 is 99860972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27906899 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27909899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13953449 + 13953450.

It is an arithmetic number, because the mean of its divisors is an integer number (13953450).

Almost surely, 2^27906899 is an apocalyptic number.

27906899 is a deficient number, since it is larger than the sum of its proper divisors (1).

27906899 is an equidigital number, since it uses as much as digits as its factorization.

27906899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 27906899 is about 5282.6980795802. The cubic root of 27906899 is about 303.3219645808.

The spelling of 27906899 in words is "twenty-seven million, nine hundred six thousand, eight hundred ninety-nine".