27001969 has 2 divisors, whose sum is σ = 27001970. Its totient is φ = 27001968.

The previous prime is 27001943. The next prime is 27001973. The reversal of 27001969 is 96910072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 9529569 = 4180^2 + 3087^2 .

It is a cyclic number.

It is not a de Polignac number, because 27001969 - 2⁵ = 27001937 is a prime.

It is a super-2 number, since 2×27001969² = 1458212659753922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27001369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13500984 + 13500985.

It is an arithmetic number, because the mean of its divisors is an integer number (13500985).

Almost surely, 2^27001969 is an apocalyptic number.

It is an amenable number.

27001969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27001969 is an equidigital number, since it uses as much as digits as its factorization.

27001969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 27001969 is about 5196.3418863658. The cubic root of 27001969 is about 300.0072924153.

The spelling of 27001969 in words is "twenty-seven million, one thousand, nine hundred sixty-nine".