43564373 has 2 divisors, whose sum is σ = 43564374. Its totient is φ = 43564372.

The previous prime is 43564337. The next prime is 43564379. The reversal of 43564373 is 37346534.

Together with previous prime (43564337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43335889 + 228484 = 6583^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 43564373 - 2¹² = 43560277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43564379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21782186 + 21782187.

It is an arithmetic number, because the mean of its divisors is an integer number (21782187).

Almost surely, 2^43564373 is an apocalyptic number.

It is an amenable number.

43564373 is a deficient number, since it is larger than the sum of its proper divisors (1).

43564373 is an equidigital number, since it uses as much as digits as its factorization.

43564373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 35.

The square root of 43564373 is about 6600.3312795647. The cubic root of 43564373 is about 351.8658800548.

The spelling of 43564373 in words is "forty-three million, five hundred sixty-four thousand, three hundred seventy-three".