64530493 has 2 divisors, whose sum is σ = 64530494. Its totient is φ = 64530492.

The previous prime is 64530491. The next prime is 64530533. The reversal of 64530493 is 39403546.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62378404 + 2152089 = 7898^2 + 1467^2 .

It is a cyclic number.

It is not a de Polignac number, because 64530493 - 2¹ = 64530491 is a prime.

Together with 64530491, 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 (64530491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32265246 + 32265247.

It is an arithmetic number, because the mean of its divisors is an integer number (32265247).

Almost surely, 2^64530493 is an apocalyptic number.

It is an amenable number.

64530493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64530493 is an equidigital number, since it uses as much as digits as its factorization.

64530493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 64530493 is about 8033.0873890429. The cubic root of 64530493 is about 401.1021541016.

The spelling of 64530493 in words is "sixty-four million, five hundred thirty thousand, four hundred ninety-three".