64771843 has 2 divisors, whose sum is σ = 64771844. Its totient is φ = 64771842.

The previous prime is 64771829. The next prime is 64771849. The reversal of 64771843 is 34817746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64771843 - 2²⁵ = 31217411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64771796 and 64771805.

It is not a weakly prime, because it can be changed into another prime (64771849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32385921 + 32385922.

It is an arithmetic number, because the mean of its divisors is an integer number (32385922).

Almost surely, 2^64771843 is an apocalyptic number.

64771843 is a deficient number, since it is larger than the sum of its proper divisors (1).

64771843 is an equidigital number, since it uses as much as digits as its factorization.

64771843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 64771843 is about 8048.0956132491. The cubic root of 64771843 is about 401.6015850050.

The spelling of 64771843 in words is "sixty-four million, seven hundred seventy-one thousand, eight hundred forty-three".