64943873 has 2 divisors, whose sum is σ = 64943874. Its totient is φ = 64943872.

The previous prime is 64943821. The next prime is 64943887. The reversal of 64943873 is 37834946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57501889 + 7441984 = 7583^2 + 2728^2 .

It is a cyclic number.

It is not a de Polignac number, because 64943873 - 2¹⁰ = 64942849 is a prime.

It is not a weakly prime, because it can be changed into another prime (64943173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32471936 + 32471937.

It is an arithmetic number, because the mean of its divisors is an integer number (32471937).

Almost surely, 2^64943873 is an apocalyptic number.

It is an amenable number.

64943873 is a deficient number, since it is larger than the sum of its proper divisors (1).

64943873 is an equidigital number, since it uses as much as digits as its factorization.

64943873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The square root of 64943873 is about 8058.7761477783. The cubic root of 64943873 is about 401.9568136738.

The spelling of 64943873 in words is "sixty-four million, nine hundred forty-three thousand, eight hundred seventy-three".