64095991 has 2 divisors, whose sum is σ = 64095992. Its totient is φ = 64095990.

The previous prime is 64095989. The next prime is 64096013. The reversal of 64095991 is 19959046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64095991 - 2¹ = 64095989 is a prime.

Together with 64095989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64095091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32047995 + 32047996.

It is an arithmetic number, because the mean of its divisors is an integer number (32047996).

Almost surely, 2^64095991 is an apocalyptic number.

64095991 is a deficient number, since it is larger than the sum of its proper divisors (1).

64095991 is an equidigital number, since it uses as much as digits as its factorization.

64095991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 64095991 is about 8005.9971896073. The cubic root of 64095991 is about 400.1998813520.

The spelling of 64095991 in words is "sixty-four million, ninety-five thousand, nine hundred ninety-one".