27490643 has 4 divisors (see below), whose sum is σ = 27520920. Its totient is φ = 27460368.

The previous prime is 27490633. The next prime is 27490651. The reversal of 27490643 is 34609472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27490643 - 2⁴ = 27490627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27490613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13733 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (6880230).

Almost surely, 2^27490643 is an apocalyptic number.

27490643 is a deficient number, since it is larger than the sum of its proper divisors (30277).

27490643 is an equidigital number, since it uses as much as digits as its factorization.

27490643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30276.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 27490643 is about 5243.1520100031. The cubic root of 27490643 is about 301.8062987515.

The spelling of 27490643 in words is "twenty-seven million, four hundred ninety thousand, six hundred forty-three".