64023643 has 4 divisors (see below), whose sum is σ = 64046920. Its totient is φ = 64000368.

The previous prime is 64023623. The next prime is 64023647. The reversal of 64023643 is 34632046.

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 64023643 - 2⁹ = 64023131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64023647) 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, 6858 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (16011730).

Almost surely, 2^64023643 is an apocalyptic number.

64023643 is a deficient number, since it is larger than the sum of its proper divisors (23277).

64023643 is a wasteful number, since it uses less digits than its factorization.

64023643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23276.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 64023643 is about 8001.4775510527. The cubic root of 64023643 is about 400.0492501858.

Adding to 64023643 its reverse (34632046), we get a palindrome (98655689).

The spelling of 64023643 in words is "sixty-four million, twenty-three thousand, six hundred forty-three".