64238543 has 2 divisors, whose sum is σ = 64238544. Its totient is φ = 64238542.

The previous prime is 64238507. The next prime is 64238561. The reversal of 64238543 is 34583246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64238543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119271 + 32119272.

It is an arithmetic number, because the mean of its divisors is an integer number (32119272).

Almost surely, 2^64238543 is an apocalyptic number.

64238543 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238543 is an equidigital number, since it uses as much as digits as its factorization.

64238543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 35.

The square root of 64238543 is about 8014.8950710536. The cubic root of 64238543 is about 400.4963484242.

The spelling of 64238543 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred forty-three".