27997049 has 16 divisors (see below), whose sum is σ = 30336768. Its totient is φ = 25768512.

The previous prime is 27997037. The next prime is 27997069. The reversal of 27997049 is 94079972.

It is a cyclic number.

It is not a de Polignac number, because 27997049 - 2¹² = 27992953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27996994 and 27997012.

It is not an unprimeable number, because it can be changed into a prime (27997009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142019 + ... + 142215.

It is an arithmetic number, because the mean of its divisors is an integer number (1896048).

Almost surely, 2^27997049 is an apocalyptic number.

It is an amenable number.

27997049 is a deficient number, since it is larger than the sum of its proper divisors (2339719).

27997049 is a wasteful number, since it uses less digits than its factorization.

27997049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 27997049 is about 5291.2237714918. The cubic root of 27997049 is about 303.6482289865.

The spelling of 27997049 in words is "twenty-seven million, nine hundred ninety-seven thousand, forty-nine".