64191373 has 2 divisors, whose sum is σ = 64191374. Its totient is φ = 64191372.

The previous prime is 64191349. The next prime is 64191377. The reversal of 64191373 is 37319146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62932489 + 1258884 = 7933^2 + 1122^2 .

It is a cyclic number.

It is not a de Polignac number, because 64191373 - 2⁵ = 64191341 is a prime.

It is a super-3 number, since 3×64191373³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64191377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32095686 + 32095687.

It is an arithmetic number, because the mean of its divisors is an integer number (32095687).

Almost surely, 2^64191373 is an apocalyptic number.

It is an amenable number.

64191373 is a deficient number, since it is larger than the sum of its proper divisors (1).

64191373 is an equidigital number, since it uses as much as digits as its factorization.

64191373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 64191373 is about 8011.9518845285. The cubic root of 64191373 is about 400.3982970171.

The spelling of 64191373 in words is "sixty-four million, one hundred ninety-one thousand, three hundred seventy-three".