78727427 has 8 divisors (see below), whose sum is σ = 80474112. Its totient is φ = 76998600.

The previous prime is 78727403. The next prime is 78727433. The reversal of 78727427 is 72472787.

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 78727427 - 2¹² = 78723331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78727447) 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, 4652 + ... + 13382.

It is an arithmetic number, because the mean of its divisors is an integer number (10059264).

Almost surely, 2^78727427 is an apocalyptic number.

78727427 is a deficient number, since it is larger than the sum of its proper divisors (1746685).

78727427 is a wasteful number, since it uses less digits than its factorization.

78727427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929.

The product of its digits is 307328, while the sum is 44.

The square root of 78727427 is about 8872.8477390294. The cubic root of 78727427 is about 428.5899857626.

The spelling of 78727427 in words is "seventy-eight million, seven hundred twenty-seven thousand, four hundred twenty-seven".