27999461 has 4 divisors (see below), whose sum is σ = 31999392. Its totient is φ = 23999532.

The previous prime is 27999443. The next prime is 27999463. The reversal of 27999461 is 16499972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27999461 - 2⁶ = 27999397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27999463) 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, 1999955 + ... + 1999968.

It is an arithmetic number, because the mean of its divisors is an integer number (7999848).

Almost surely, 2^27999461 is an apocalyptic number.

It is an amenable number.

27999461 is a deficient number, since it is larger than the sum of its proper divisors (3999931).

27999461 is an equidigital number, since it uses as much as digits as its factorization.

27999461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999930.

The product of its digits is 244944, while the sum is 47.

The square root of 27999461 is about 5291.4516911713. The cubic root of 27999461 is about 303.6569486971.

The spelling of 27999461 in words is "twenty-seven million, nine hundred ninety-nine thousand, four hundred sixty-one".