43379885257 has 4 divisors (see below), whose sum is σ = 43408221136. Its totient is φ = 43351549380.

The previous prime is 43379885251. The next prime is 43379885261. The reversal of 43379885257 is 75258897334.

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-43379885257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43379885195 and 43379885204.

It is not an unprimeable number, because it can be changed into a prime (43379885251) 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, 14165643 + ... + 14168704.

It is an arithmetic number, because the mean of its divisors is an integer number (10852055284).

Almost surely, 2^43379885257 is an apocalyptic number.

It is an amenable number.

43379885257 is a deficient number, since it is larger than the sum of its proper divisors (28335879).

43379885257 is a wasteful number, since it uses less digits than its factorization.

43379885257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28335878.

The product of its digits is 50803200, while the sum is 61.

The spelling of 43379885257 in words is "forty-three billion, three hundred seventy-nine million, eight hundred eighty-five thousand, two hundred fifty-seven".