64824191 has 2 divisors, whose sum is σ = 64824192. Its totient is φ = 64824190.

The previous prime is 64824121. The next prime is 64824203. The reversal of 64824191 is 19142846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64824191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64824121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32412095 + 32412096.

It is an arithmetic number, because the mean of its divisors is an integer number (32412096).

Almost surely, 2^64824191 is an apocalyptic number.

64824191 is a deficient number, since it is larger than the sum of its proper divisors (1).

64824191 is an equidigital number, since it uses as much as digits as its factorization.

64824191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 64824191 is about 8051.3471543587. The cubic root of 64824191 is about 401.7097460916.

The spelling of 64824191 in words is "sixty-four million, eight hundred twenty-four thousand, one hundred ninety-one".