27958157 has 2 divisors, whose sum is σ = 27958158. Its totient is φ = 27958156.

The previous prime is 27958123. The next prime is 27958159. The reversal of 27958157 is 75185972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24344356 + 3613801 = 4934^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 27958157 - 2¹² = 27954061 is a prime.

Together with 27958159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27958159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13979078 + 13979079.

It is an arithmetic number, because the mean of its divisors is an integer number (13979079).

Almost surely, 2^27958157 is an apocalyptic number.

It is an amenable number.

27958157 is a deficient number, since it is larger than the sum of its proper divisors (1).

27958157 is an equidigital number, since it uses as much as digits as its factorization.

27958157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 44.

The square root of 27958157 is about 5287.5473520338. The cubic root of 27958157 is about 303.5075598811.

The spelling of 27958157 in words is "twenty-seven million, nine hundred fifty-eight thousand, one hundred fifty-seven".