43020349 has 2 divisors, whose sum is σ = 43020350. Its totient is φ = 43020348.

The previous prime is 43020331. The next prime is 43020403. The reversal of 43020349 is 94302034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36517849 + 6502500 = 6043^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 43020349 - 2⁵ = 43020317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43020049) 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, 21510174 + 21510175.

It is an arithmetic number, because the mean of its divisors is an integer number (21510175).

Almost surely, 2^43020349 is an apocalyptic number.

It is an amenable number.

43020349 is a deficient number, since it is larger than the sum of its proper divisors (1).

43020349 is an equidigital number, since it uses as much as digits as its factorization.

43020349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 43020349 is about 6558.9899374828. The cubic root of 43020349 is about 350.3950613909.

The spelling of 43020349 in words is "forty-three million, twenty thousand, three hundred forty-nine".