27021901 has 2 divisors, whose sum is σ = 27021902. Its totient is φ = 27021900.

The previous prime is 27021893. The next prime is 27021919. The reversal of 27021901 is 10912072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21846276 + 5175625 = 4674^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 27021901 - 2³ = 27021893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27021991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13510950 + 13510951.

It is an arithmetic number, because the mean of its divisors is an integer number (13510951).

Almost surely, 2^27021901 is an apocalyptic number.

It is an amenable number.

27021901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27021901 is an equidigital number, since it uses as much as digits as its factorization.

27021901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 27021901 is about 5198.2594202290. The cubic root of 27021901 is about 300.0810928926.

Adding to 27021901 its reverse (10912072), we get a palindrome (37933973).

The spelling of 27021901 in words is "twenty-seven million, twenty-one thousand, nine hundred one".