27751961 has 8 divisors (see below), whose sum is σ = 29742144. Its totient is φ = 25827120.

The previous prime is 27751937. The next prime is 27751967. The reversal of 27751961 is 16915772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27751961 - 2⁶ = 27751897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27751967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15455 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (3717768).

Almost surely, 2^27751961 is an apocalyptic number.

It is an amenable number.

27751961 is a deficient number, since it is larger than the sum of its proper divisors (1990183).

27751961 is a wasteful number, since it uses less digits than its factorization.

27751961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32671.

The product of its digits is 26460, while the sum is 38.

The square root of 27751961 is about 5268.0130030212. The cubic root of 27751961 is about 302.7595786597.

The spelling of 27751961 in words is "twenty-seven million, seven hundred fifty-one thousand, nine hundred sixty-one".