64159943 has 2 divisors, whose sum is σ = 64159944. Its totient is φ = 64159942.

The previous prime is 64159891. The next prime is 64159951. The reversal of 64159943 is 34995146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64159943 - 2²² = 59965639 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64159943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64159993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32079971 + 32079972.

It is an arithmetic number, because the mean of its divisors is an integer number (32079972).

Almost surely, 2^64159943 is an apocalyptic number.

64159943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64159943 is an equidigital number, since it uses as much as digits as its factorization.

64159943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 64159943 is about 8009.9901997443. The cubic root of 64159943 is about 400.3329373882.

The spelling of 64159943 in words is "sixty-four million, one hundred fifty-nine thousand, nine hundred forty-three".