27400819 has 2 divisors, whose sum is σ = 27400820. Its totient is φ = 27400818.

The previous prime is 27400811. The next prime is 27400883. The reversal of 27400819 is 91800472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27400819 - 2³ = 27400811 is a prime.

It is a super-2 number, since 2×27400819² = 1501609763741522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27400811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13700409 + 13700410.

It is an arithmetic number, because the mean of its divisors is an integer number (13700410).

Almost surely, 2^27400819 is an apocalyptic number.

27400819 is a deficient number, since it is larger than the sum of its proper divisors (1).

27400819 is an equidigital number, since it uses as much as digits as its factorization.

27400819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 27400819 is about 5234.5791616901. The cubic root of 27400819 is about 301.4772288585.

The spelling of 27400819 in words is "twenty-seven million, four hundred thousand, eight hundred nineteen".