43474677997 has 4 divisors (see below), whose sum is σ = 44123553856. Its totient is φ = 42825802140.

The previous prime is 43474677943. The next prime is 43474678019. The reversal of 43474677997 is 79977647434.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79977647434 = 2 ⋅39988823717.

It is a cyclic number.

It is not a de Polignac number, because 43474677997 - 2¹¹ = 43474675949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67), and also a Moran number because the ratio is a prime number: 648875791 = 43474677997 / (4 + 3 + 4 + 7 + 4 + 6 + 7 + 7 + 9 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43474675997) 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, 324437829 + ... + 324437962.

It is an arithmetic number, because the mean of its divisors is an integer number (11030888464).

Almost surely, 2^43474677997 is an apocalyptic number.

It is an amenable number.

43474677997 is a deficient number, since it is larger than the sum of its proper divisors (648875859).

43474677997 is an equidigital number, since it uses as much as digits as its factorization.

43474677997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648875858.

The product of its digits is 224042112, while the sum is 67.

The spelling of 43474677997 in words is "forty-three billion, four hundred seventy-four million, six hundred seventy-seven thousand, nine hundred ninety-seven".