43428373 has 2 divisors, whose sum is σ = 43428374. Its totient is φ = 43428372.

The previous prime is 43428317. The next prime is 43428379. The reversal of 43428373 is 37382434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40666129 + 2762244 = 6377^2 + 1662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43428373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43428379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21714186 + 21714187.

It is an arithmetic number, because the mean of its divisors is an integer number (21714187).

Almost surely, 2^43428373 is an apocalyptic number.

It is an amenable number.

43428373 is a deficient number, since it is larger than the sum of its proper divisors (1).

43428373 is an equidigital number, since it uses as much as digits as its factorization.

43428373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 34.

The square root of 43428373 is about 6590.0207131693. The cubic root of 43428373 is about 351.4993447429.

The spelling of 43428373 in words is "forty-three million, four hundred twenty-eight thousand, three hundred seventy-three".