43620349 has 2 divisors, whose sum is σ = 43620350. Its totient is φ = 43620348.

The previous prime is 43620323. The next prime is 43620439. The reversal of 43620349 is 94302634.

Together with next prime (43620439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35105625 + 8514724 = 5925^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 43620349 - 2²³ = 35231741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43620349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43620319) 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, 21810174 + 21810175.

It is an arithmetic number, because the mean of its divisors is an integer number (21810175).

Almost surely, 2^43620349 is an apocalyptic number.

It is an amenable number.

43620349 is a deficient number, since it is larger than the sum of its proper divisors (1).

43620349 is an equidigital number, since it uses as much as digits as its factorization.

43620349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 43620349 is about 6604.5703115343. The cubic root of 43620349 is about 352.0165200795.

The spelling of 43620349 in words is "forty-three million, six hundred twenty thousand, three hundred forty-nine".