27640001 has 2 divisors, whose sum is σ = 27640002. Its totient is φ = 27640000.

The previous prime is 27639971. The next prime is 27640033. The reversal of 27640001 is 10004672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 3236401 = 4940^2 + 1799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27640001 is a prime.

It is not a weakly prime, because it can be changed into another prime (27640051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13820000 + 13820001.

It is an arithmetic number, because the mean of its divisors is an integer number (13820001).

Almost surely, 2^27640001 is an apocalyptic number.

It is an amenable number.

27640001 is a deficient number, since it is larger than the sum of its proper divisors (1).

27640001 is an equidigital number, since it uses as much as digits as its factorization.

27640001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 27640001 is about 5257.3758663424. The cubic root of 27640001 is about 302.3518879685.

Adding to 27640001 its reverse (10004672), we get a palindrome (37644673).

The spelling of 27640001 in words is "twenty-seven million, six hundred forty thousand, one".