27739161 has 6 divisors (see below), whose sum is σ = 40067690. Its totient is φ = 18492768.

The previous prime is 27739133. The next prime is 27739163. The reversal of 27739161 is 16193772.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 6533136 = 4605^2 + 2556^2 .

It is not a de Polignac number, because 27739161 - 2⁶ = 27739097 is a prime.

It is a super-2 number, since 2×27739161² = 1538922105967842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27739163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1541056 + ... + 1541073.

Almost surely, 2^27739161 is an apocalyptic number.

It is an amenable number.

27739161 is a deficient number, since it is larger than the sum of its proper divisors (12328529).

27739161 is a wasteful number, since it uses less digits than its factorization.

27739161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082135 (or 3082132 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 27739161 is about 5266.7979835950. The cubic root of 27739161 is about 302.7130243692.

The spelling of 27739161 in words is "twenty-seven million, seven hundred thirty-nine thousand, one hundred sixty-one".