64336427 has 4 divisors (see below), whose sum is σ = 64403256. Its totient is φ = 64269600.

The previous prime is 64336423. The next prime is 64336453. The reversal of 64336427 is 72463346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72463346 = 2 ⋅36231673.

It is a cyclic number.

It is not a de Polignac number, because 64336427 - 2² = 64336423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64336423) 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, 31949 + ... + 33902.

It is an arithmetic number, because the mean of its divisors is an integer number (16100814).

Almost surely, 2^64336427 is an apocalyptic number.

64336427 is a deficient number, since it is larger than the sum of its proper divisors (66829).

64336427 is an equidigital number, since it uses as much as digits as its factorization.

64336427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66828.

The product of its digits is 72576, while the sum is 35.

The square root of 64336427 is about 8020.9991272908. Note that the first 3 decimals coincide. The cubic root of 64336427 is about 400.6996650418.

The spelling of 64336427 in words is "sixty-four million, three hundred thirty-six thousand, four hundred twenty-seven".