64722443 has 2 divisors, whose sum is σ = 64722444. Its totient is φ = 64722442.

The previous prime is 64722433. The next prime is 64722473. The reversal of 64722443 is 34422746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64722443 - 2⁸ = 64722187 is a prime.

It is not a weakly prime, because it can be changed into another prime (64722433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32361221 + 32361222.

It is an arithmetic number, because the mean of its divisors is an integer number (32361222).

Almost surely, 2^64722443 is an apocalyptic number.

64722443 is a deficient number, since it is larger than the sum of its proper divisors (1).

64722443 is an equidigital number, since it uses as much as digits as its factorization.

64722443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 32.

The square root of 64722443 is about 8045.0259788269. The cubic root of 64722443 is about 401.4994615970.

The spelling of 64722443 in words is "sixty-four million, seven hundred twenty-two thousand, four hundred forty-three".