43401109 has 2 divisors, whose sum is σ = 43401110. Its totient is φ = 43401108.

The previous prime is 43401101. The next prime is 43401131. The reversal of 43401109 is 90110434.

It is an a-pointer prime, because the next prime (43401131) can be obtained adding 43401109 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33097009 + 10304100 = 5753^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 43401109 - 2³ = 43401101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43401109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43401101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700554 + 21700555.

It is an arithmetic number, because the mean of its divisors is an integer number (21700555).

Almost surely, 2^43401109 is an apocalyptic number.

It is an amenable number.

43401109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401109 is an equidigital number, since it uses as much as digits as its factorization.

43401109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 43401109 is about 6587.9518061382. The cubic root of 43401109 is about 351.4257731459.

The spelling of 43401109 in words is "forty-three million, four hundred one thousand, one hundred nine".