43795969921 has 4 divisors (see below), whose sum is σ = 47777421744. Its totient is φ = 39814518100.

The previous prime is 43795969883. The next prime is 43795969951. The reversal of 43795969921 is 12996959734.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43795969921 is a prime.

It is a super-2 number, since 2×43795969921² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43795969951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990725895 + ... + 1990725916.

It is an arithmetic number, because the mean of its divisors is an integer number (11944355436).

Almost surely, 2^43795969921 is an apocalyptic number.

It is an amenable number.

43795969921 is a deficient number, since it is larger than the sum of its proper divisors (3981451823).

43795969921 is a wasteful number, since it uses less digits than its factorization.

43795969921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981451822.

The product of its digits is 33067440, while the sum is 64.

The spelling of 43795969921 in words is "forty-three billion, seven hundred ninety-five million, nine hundred sixty-nine thousand, nine hundred twenty-one".