64143173 has 2 divisors, whose sum is σ = 64143174. Its totient is φ = 64143172.

The previous prime is 64143169. The next prime is 64143179. The reversal of 64143173 is 37134146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 25230529 = 6238^2 + 5023^2 .

It is a cyclic number.

It is not a de Polignac number, because 64143173 - 2² = 64143169 is a prime.

It is a super-2 number, since 2×64143173² = 8228693285015858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64143179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071586 + 32071587.

It is an arithmetic number, because the mean of its divisors is an integer number (32071587).

Almost surely, 2^64143173 is an apocalyptic number.

It is an amenable number.

64143173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64143173 is an equidigital number, since it uses as much as digits as its factorization.

64143173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 64143173 is about 8008.9433135714. The cubic root of 64143173 is about 400.2980549363.

The spelling of 64143173 in words is "sixty-four million, one hundred forty-three thousand, one hundred seventy-three".