43421321093 has 4 divisors (see below), whose sum is σ = 43426580460. Its totient is φ = 43416061728.

The previous prime is 43421321059. The next prime is 43421321117. The reversal of 43421321093 is 39012312434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39012312434 = 2 ⋅19506156217.

It can be written as a sum of positive squares in 2 ways, for example, as 17584616449 + 25836704644 = 132607^2 + 160738^2 .

It is a cyclic number.

It is not a de Polignac number, because 43421321093 - 2³² = 39126353797 is a prime.

It is a super-2 number, since 2×43421321093² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421321003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2617280 + ... + 2633817.

It is an arithmetic number, because the mean of its divisors is an integer number (10856645115).

Almost surely, 2^43421321093 is an apocalyptic number.

It is an amenable number.

43421321093 is a deficient number, since it is larger than the sum of its proper divisors (5259367).

43421321093 is an equidigital number, since it uses as much as digits as its factorization.

43421321093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259366.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 43421321093 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty-one thousand, ninety-three".