64189427 has 2 divisors, whose sum is σ = 64189428. Its totient is φ = 64189426.

The previous prime is 64189423. The next prime is 64189453. The reversal of 64189427 is 72498146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64189427 - 2² = 64189423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64189421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32094713 + 32094714.

It is an arithmetic number, because the mean of its divisors is an integer number (32094714).

Almost surely, 2^64189427 is an apocalyptic number.

64189427 is a deficient number, since it is larger than the sum of its proper divisors (1).

64189427 is an equidigital number, since it uses as much as digits as its factorization.

64189427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 64189427 is about 8011.8304400430. The cubic root of 64189427 is about 400.3942508713.

The spelling of 64189427 in words is "sixty-four million, one hundred eighty-nine thousand, four hundred twenty-seven".