27952391 has 2 divisors, whose sum is σ = 27952392. Its totient is φ = 27952390.

The previous prime is 27952367. The next prime is 27952409. The reversal of 27952391 is 19325972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27952391 - 2²² = 23758087 is a prime.

It is equal to p_1738667 and since 27952391 and 1738667 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27952321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13976195 + 13976196.

It is an arithmetic number, because the mean of its divisors is an integer number (13976196).

Almost surely, 2^27952391 is an apocalyptic number.

27952391 is a deficient number, since it is larger than the sum of its proper divisors (1).

27952391 is an equidigital number, since it uses as much as digits as its factorization.

27952391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 27952391 is about 5287.0020805746. The cubic root of 27952391 is about 303.4866936402.

The spelling of 27952391 in words is "twenty-seven million, nine hundred fifty-two thousand, three hundred ninety-one".