64127647 has 2 divisors, whose sum is σ = 64127648. Its totient is φ = 64127646.

The previous prime is 64127639. The next prime is 64127659. The reversal of 64127647 is 74672146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64127647 - 2³ = 64127639 is a prime.

It is a super-2 number, since 2×64127647² = 8224710219513218, which contains 22 as substring.

It is equal to p_3792178 and since 64127647 and 3792178 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64127047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32063823 + 32063824.

It is an arithmetic number, because the mean of its divisors is an integer number (32063824).

Almost surely, 2^64127647 is an apocalyptic number.

64127647 is a deficient number, since it is larger than the sum of its proper divisors (1).

64127647 is an equidigital number, since it uses as much as digits as its factorization.

64127647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 64127647 is about 8007.9739634941. The cubic root of 64127647 is about 400.2657546471.

The spelling of 64127647 in words is "sixty-four million, one hundred twenty-seven thousand, six hundred forty-seven".