27921601 has 2 divisors, whose sum is σ = 27921602. Its totient is φ = 27921600.

The previous prime is 27921589. The next prime is 27921613. The reversal of 27921601 is 10612972.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (27921589) and next prime (27921613).

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 11397376 = 4065^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 27921601 - 2¹³ = 27913409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27921601.

It is not a weakly prime, because it can be changed into another prime (27921671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13960800 + 13960801.

It is an arithmetic number, because the mean of its divisors is an integer number (13960801).

Almost surely, 2^27921601 is an apocalyptic number.

It is an amenable number.

27921601 is a deficient number, since it is larger than the sum of its proper divisors (1).

27921601 is an equidigital number, since it uses as much as digits as its factorization.

27921601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 27921601 is about 5284.0894201366. The cubic root of 27921601 is about 303.3752209057.

The spelling of 27921601 in words is "twenty-seven million, nine hundred twenty-one thousand, six hundred one".