64143427 has 2 divisors, whose sum is σ = 64143428. Its totient is φ = 64143426.

The previous prime is 64143419. The next prime is 64143467. The reversal of 64143427 is 72434146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64143427 - 2³ = 64143419 is a prime.

It is a super-2 number, since 2×64143427² = 8228758454608658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64143407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071713 + 32071714.

It is an arithmetic number, because the mean of its divisors is an integer number (32071714).

Almost surely, 2^64143427 is an apocalyptic number.

64143427 is a deficient number, since it is larger than the sum of its proper divisors (1).

64143427 is an equidigital number, since it uses as much as digits as its factorization.

64143427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 64143427 is about 8008.9591708286. The cubic root of 64143427 is about 400.2985833146.

The spelling of 64143427 in words is "sixty-four million, one hundred forty-three thousand, four hundred twenty-seven".