646714193 has 2 divisors, whose sum is σ = 646714194. Its totient is φ = 646714192.

The previous prime is 646714169. The next prime is 646714283. The reversal of 646714193 is 391417646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363397969 + 283316224 = 19063^2 + 16832^2 .

It is a cyclic number.

It is not a de Polignac number, because 646714193 - 2¹⁴ = 646697809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646714193.

It is not a weakly prime, because it can be changed into another prime (646714093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323357096 + 323357097.

It is an arithmetic number, because the mean of its divisors is an integer number (323357097).

Almost surely, 2^646714193 is an apocalyptic number.

It is an amenable number.

646714193 is a deficient number, since it is larger than the sum of its proper divisors (1).

646714193 is an equidigital number, since it uses as much as digits as its factorization.

646714193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 646714193 is about 25430.5759470760. The cubic root of 646714193 is about 864.7770006638. Note that the first 3 decimals are identical.

The spelling of 646714193 in words is "six hundred forty-six million, seven hundred fourteen thousand, one hundred ninety-three".