64159691 has 2 divisors, whose sum is σ = 64159692. Its totient is φ = 64159690.

The previous prime is 64159681. The next prime is 64159699. The reversal of 64159691 is 19695146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64159691 - 2¹⁰ = 64158667 is a prime.

It is a super-3 number, since 3×64159691³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64159699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32079845 + 32079846.

It is an arithmetic number, because the mean of its divisors is an integer number (32079846).

Almost surely, 2^64159691 is an apocalyptic number.

64159691 is a deficient number, since it is larger than the sum of its proper divisors (1).

64159691 is an equidigital number, since it uses as much as digits as its factorization.

64159691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 64159691 is about 8009.9744693725. The cubic root of 64159691 is about 400.3324132604.

The spelling of 64159691 in words is "sixty-four million, one hundred fifty-nine thousand, six hundred ninety-one".