64506373 has 2 divisors, whose sum is σ = 64506374. Its totient is φ = 64506372.

The previous prime is 64506371. The next prime is 64506391. The reversal of 64506373 is 37360546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 24980004 = 6287^2 + 4998^2 .

It is a cyclic number.

It is not a de Polignac number, because 64506373 - 2¹ = 64506371 is a prime.

It is a super-2 number, since 2×64506373² = 8322144315230258, which contains 22 as substring.

Together with 64506371, 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 (64506371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32253186 + 32253187.

It is an arithmetic number, because the mean of its divisors is an integer number (32253187).

Almost surely, 2^64506373 is an apocalyptic number.

It is an amenable number.

64506373 is a deficient number, since it is larger than the sum of its proper divisors (1).

64506373 is an equidigital number, since it uses as much as digits as its factorization.

64506373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 64506373 is about 8031.5859579538. The cubic root of 64506373 is about 401.0521736498.

The spelling of 64506373 in words is "sixty-four million, five hundred six thousand, three hundred seventy-three".