27831901 has 2 divisors, whose sum is σ = 27831902. Its totient is φ = 27831900.

The previous prime is 27831899. The next prime is 27831913. The reversal of 27831901 is 10913872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21631801 + 6200100 = 4651^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 27831901 - 2¹ = 27831899 is a prime.

It is a super-2 number, since 2×27831901² = 1549229426547602, which contains 22 as substring.

Together with 27831899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27831931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13915950 + 13915951.

It is an arithmetic number, because the mean of its divisors is an integer number (13915951).

Almost surely, 2^27831901 is an apocalyptic number.

It is an amenable number.

27831901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27831901 is an equidigital number, since it uses as much as digits as its factorization.

27831901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 27831901 is about 5275.5948479769. The cubic root of 27831901 is about 303.0500013697.

The spelling of 27831901 in words is "twenty-seven million, eight hundred thirty-one thousand, nine hundred one".