43928390669 has 2 divisors, whose sum is σ = 43928390670. Its totient is φ = 43928390668.

The previous prime is 43928390663. The next prime is 43928390689. The reversal of 43928390669 is 96609382934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36265489225 + 7662901444 = 190435^2 + 87538^2 .

It is a cyclic number.

It is not a de Polignac number, because 43928390669 - 2²⁰ = 43927342093 is a prime.

It is a super-2 number, since 2×43928390669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43928390663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21964195334 + 21964195335.

It is an arithmetic number, because the mean of its divisors is an integer number (21964195335).

Almost surely, 2^43928390669 is an apocalyptic number.

It is an amenable number.

43928390669 is a deficient number, since it is larger than the sum of its proper divisors (1).

43928390669 is an equidigital number, since it uses as much as digits as its factorization.

43928390669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 59.

The spelling of 43928390669 in words is "forty-three billion, nine hundred twenty-eight million, three hundred ninety thousand, six hundred sixty-nine".