43312069 has 2 divisors, whose sum is σ = 43312070. Its totient is φ = 43312068.

The previous prime is 43312067. The next prime is 43312079. The reversal of 43312069 is 96021334.

43312069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24502500 + 18809569 = 4950^2 + 4337^2 .

It is a cyclic number.

It is not a de Polignac number, because 43312069 - 2¹ = 43312067 is a prime.

It is a super-2 number, since 2×43312069² = 3751870642121522, which contains 22 as substring.

Together with 43312067, 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 (43312067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21656034 + 21656035.

It is an arithmetic number, because the mean of its divisors is an integer number (21656035).

Almost surely, 2^43312069 is an apocalyptic number.

It is an amenable number.

43312069 is a deficient number, since it is larger than the sum of its proper divisors (1).

43312069 is an equidigital number, since it uses as much as digits as its factorization.

43312069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 43312069 is about 6581.1905457903. The cubic root of 43312069 is about 351.1852848696.

It can be divided in two parts, 4331 and 2069, that added together give a square (6400 = 80²).

The spelling of 43312069 in words is "forty-three million, three hundred twelve thousand, sixty-nine".