27477949 has 6 divisors (see below), whose sum is σ = 27798170. Its totient is φ = 27161376.

The previous prime is 27477943. The next prime is 27477979. The reversal of 27477949 is 94977472.

It can be written as a sum of positive squares in 3 ways, for example, as 1651225 + 25826724 = 1285^2 + 5082^2 .

It is not a de Polignac number, because 27477949 - 2³ = 27477941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27477941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6187 + ... + 9655.

Almost surely, 2^27477949 is an apocalyptic number.

It is an amenable number.

27477949 is a deficient number, since it is larger than the sum of its proper divisors (320221).

27477949 is an frugal number, since it uses more digits than its factorization.

27477949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647 (or 3558 counting only the distinct ones).

The product of its digits is 889056, while the sum is 49.

The square root of 27477949 is about 5241.9413388553. The cubic root of 27477949 is about 301.7598378643.

The spelling of 27477949 in words is "twenty-seven million, four hundred seventy-seven thousand, nine hundred forty-nine".