43865742373 has 4 divisors (see below), whose sum is σ = 43866176940. Its totient is φ = 43865307808.

The previous prime is 43865742367. The next prime is 43865742397. The reversal of 43865742373 is 37324756834.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30543504289 + 13322238084 = 174767^2 + 115422^2 .

It is a cyclic number.

It is not a de Polignac number, because 43865742373 - 2⁵ = 43865742341 is a prime.

It is a super-2 number, since 2×43865742373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43865742373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43865742313) 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, 21873 + ... + 297001.

It is an arithmetic number, because the mean of its divisors is an integer number (10966544235).

Almost surely, 2^43865742373 is an apocalyptic number.

It is an amenable number.

43865742373 is a deficient number, since it is larger than the sum of its proper divisors (434567).

43865742373 is a wasteful number, since it uses less digits than its factorization.

43865742373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434566.

The product of its digits is 10160640, while the sum is 52.

The spelling of 43865742373 in words is "forty-three billion, eight hundred sixty-five million, seven hundred forty-two thousand, three hundred seventy-three".