27148969 has 2 divisors, whose sum is σ = 27148970. Its totient is φ = 27148968.

The previous prime is 27148943. The next prime is 27148981. The reversal of 27148969 is 96984172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 8555625 = 4312^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 27148969 - 2¹⁷ = 27017897 is a prime.

It is a super-2 number, since 2×27148969² = 1474133035525922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27143969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13574484 + 13574485.

It is an arithmetic number, because the mean of its divisors is an integer number (13574485).

Almost surely, 2^27148969 is an apocalyptic number.

It is an amenable number.

27148969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27148969 is an equidigital number, since it uses as much as digits as its factorization.

27148969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 27148969 is about 5210.4672535196. The cubic root of 27148969 is about 300.5507254234.

It can be divided in two parts, 27 and 148969, that added together give a square (148996 = 386²).

The spelling of 27148969 in words is "twenty-seven million, one hundred forty-eight thousand, nine hundred sixty-nine".