27970291 has 2 divisors, whose sum is σ = 27970292. Its totient is φ = 27970290.

The previous prime is 27970279. The next prime is 27970301. The reversal of 27970291 is 19207972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27970291 - 2⁹ = 27969779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27970291.

It is not a weakly prime, because it can be changed into another prime (27970211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13985145 + 13985146.

It is an arithmetic number, because the mean of its divisors is an integer number (13985146).

Almost surely, 2^27970291 is an apocalyptic number.

27970291 is a deficient number, since it is larger than the sum of its proper divisors (1).

27970291 is an equidigital number, since it uses as much as digits as its factorization.

27970291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 27970291 is about 5288.6946404571. The cubic root of 27970291 is about 303.5514615360.

The spelling of 27970291 in words is "twenty-seven million, nine hundred seventy thousand, two hundred ninety-one".