64651943 has 2 divisors, whose sum is σ = 64651944. Its totient is φ = 64651942.

The previous prime is 64651903. The next prime is 64651949. The reversal of 64651943 is 34915646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64651943 - 2¹⁶ = 64586407 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64651897 and 64651906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64651949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325971 + 32325972.

It is an arithmetic number, because the mean of its divisors is an integer number (32325972).

Almost surely, 2^64651943 is an apocalyptic number.

64651943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64651943 is an equidigital number, since it uses as much as digits as its factorization.

64651943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 64651943 is about 8040.6431956654. The cubic root of 64651943 is about 401.3536286399.

The spelling of 64651943 in words is "sixty-four million, six hundred fifty-one thousand, nine hundred forty-three".