27145397 has 2 divisors, whose sum is σ = 27145398. Its totient is φ = 27145396.

The previous prime is 27145351. The next prime is 27145411. The reversal of 27145397 is 79354172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26946481 + 198916 = 5191^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 27145397 - 2¹⁴ = 27129013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27145397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27145297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13572698 + 13572699.

It is an arithmetic number, because the mean of its divisors is an integer number (13572699).

Almost surely, 2^27145397 is an apocalyptic number.

It is an amenable number.

27145397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27145397 is an equidigital number, since it uses as much as digits as its factorization.

27145397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 27145397 is about 5210.1244706821. The cubic root of 27145397 is about 300.5375436549.

The spelling of 27145397 in words is "twenty-seven million, one hundred forty-five thousand, three hundred ninety-seven".