43696909 has 2 divisors, whose sum is σ = 43696910. Its totient is φ = 43696908.

The previous prime is 43696897. The next prime is 43696921. The reversal of 43696909 is 90969634.

It is a balanced prime because it is at equal distance from previous prime (43696897) and next prime (43696921).

It can be written as a sum of positive squares in only one way, i.e., 32661225 + 11035684 = 5715^2 + 3322^2 .

It is a cyclic number.

It is not a de Polignac number, because 43696909 - 2⁷ = 43696781 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43696999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21848454 + 21848455.

It is an arithmetic number, because the mean of its divisors is an integer number (21848455).

Almost surely, 2^43696909 is an apocalyptic number.

It is an amenable number.

43696909 is a deficient number, since it is larger than the sum of its proper divisors (1).

43696909 is an equidigital number, since it uses as much as digits as its factorization.

43696909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 43696909 is about 6610.3637570107. The cubic root of 43696909 is about 352.2223462859. Note that the first 3 decimals are identical.

The spelling of 43696909 in words is "forty-three million, six hundred ninety-six thousand, nine hundred nine".