64138147 has 2 divisors, whose sum is σ = 64138148. Its totient is φ = 64138146.

The previous prime is 64138141. The next prime is 64138157. The reversal of 64138147 is 74183146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64138147 is a prime.

It is a super-2 number, since 2×64138147² = 8227403801187218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64138141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32069073 + 32069074.

It is an arithmetic number, because the mean of its divisors is an integer number (32069074).

Almost surely, 2^64138147 is an apocalyptic number.

64138147 is a deficient number, since it is larger than the sum of its proper divisors (1).

64138147 is an equidigital number, since it uses as much as digits as its factorization.

64138147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 64138147 is about 8008.6295331973. The cubic root of 64138147 is about 400.2875994169.

The spelling of 64138147 in words is "sixty-four million, one hundred thirty-eight thousand, one hundred forty-seven".