64192691 has 2 divisors, whose sum is σ = 64192692. Its totient is φ = 64192690.

The previous prime is 64192657. The next prime is 64192693. The reversal of 64192691 is 19629146.

64192691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64192691 - 2¹⁰ = 64191667 is a prime.

Together with 64192693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64192693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32096345 + 32096346.

It is an arithmetic number, because the mean of its divisors is an integer number (32096346).

Almost surely, 2^64192691 is an apocalyptic number.

64192691 is a deficient number, since it is larger than the sum of its proper divisors (1).

64192691 is an equidigital number, since it uses as much as digits as its factorization.

64192691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 64192691 is about 8012.0341362228. The cubic root of 64192691 is about 400.4010373715.

The spelling of 64192691 in words is "sixty-four million, one hundred ninety-two thousand, six hundred ninety-one".