64047743 has 4 divisors (see below), whose sum is σ = 65097768. Its totient is φ = 62997720.

The previous prime is 64047733. The next prime is 64047757. The reversal of 64047743 is 34774046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64047743 - 2¹⁸ = 63785599 is a prime.

It is a super-2 number, since 2×64047743² = 8204226766788098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64047713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524921 + ... + 525042.

It is an arithmetic number, because the mean of its divisors is an integer number (16274442).

Almost surely, 2^64047743 is an apocalyptic number.

64047743 is a deficient number, since it is larger than the sum of its proper divisors (1050025).

64047743 is a wasteful number, since it uses less digits than its factorization.

64047743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050024.

The product of its (nonzero) digits is 56448, while the sum is 35.

The square root of 64047743 is about 8002.9833812148. The cubic root of 64047743 is about 400.0994398606.

The spelling of 64047743 in words is "sixty-four million, forty-seven thousand, seven hundred forty-three".