64641383 has 2 divisors, whose sum is σ = 64641384. Its totient is φ = 64641382.

The previous prime is 64641337. The next prime is 64641391. The reversal of 64641383 is 38314646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64641383 - 2²⁰ = 63592807 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 (64641583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320691 + 32320692.

It is an arithmetic number, because the mean of its divisors is an integer number (32320692).

Almost surely, 2^64641383 is an apocalyptic number.

64641383 is a deficient number, since it is larger than the sum of its proper divisors (1).

64641383 is an equidigital number, since it uses as much as digits as its factorization.

64641383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 64641383 is about 8039.9865049638. The cubic root of 64641383 is about 401.3317755967.

The spelling of 64641383 in words is "sixty-four million, six hundred forty-one thousand, three hundred eighty-three".