270138569 has 4 divisors (see below), whose sum is σ = 271298196. Its totient is φ = 268978944.

The previous prime is 270138559. The next prime is 270138581. The reversal of 270138569 is 965831072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163532944 + 106605625 = 12788^2 + 10325^2 .

It is a cyclic number.

It is not a de Polignac number, because 270138569 - 2²⁸ = 1703113 is a prime.

It is a super-2 number, since 2×270138569² = 145949692922735522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (270138529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579464 + ... + 579929.

It is an arithmetic number, because the mean of its divisors is an integer number (67824549).

Almost surely, 2^270138569 is an apocalyptic number.

It is an amenable number.

270138569 is a deficient number, since it is larger than the sum of its proper divisors (1159627).

270138569 is a wasteful number, since it uses less digits than its factorization.

270138569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159626.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 270138569 is about 16435.8927046875. The cubic root of 270138569 is about 646.4409576775.

The spelling of 270138569 in words is "two hundred seventy million, one hundred thirty-eight thousand, five hundred sixty-nine".