27491939 has 2 divisors, whose sum is σ = 27491940. Its totient is φ = 27491938.

The previous prime is 27491929. The next prime is 27491951. The reversal of 27491939 is 93919472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27491939 - 2¹² = 27487843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27491939.

It is not a weakly prime, because it can be changed into another prime (27491929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13745969 + 13745970.

It is an arithmetic number, because the mean of its divisors is an integer number (13745970).

Almost surely, 2^27491939 is an apocalyptic number.

27491939 is a deficient number, since it is larger than the sum of its proper divisors (1).

27491939 is an equidigital number, since it uses as much as digits as its factorization.

27491939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 27491939 is about 5243.2755983259. The cubic root of 27491939 is about 301.8110413933.

The spelling of 27491939 in words is "twenty-seven million, four hundred ninety-one thousand, nine hundred thirty-nine".