43231973929 has 3 divisors (see below), whose sum is σ = 43232181853. Its totient is φ = 43231766006.

The previous prime is 43231973891. The next prime is 43231973963. The reversal of 43231973929 is 92937913234.

The square root of 43231973929 is 207923.

It is a perfect power (a square), and thus also a powerful number.

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 is not a de Polignac number, because 43231973929 - 2⁷ = 43231973801 is a prime.

It is a super-3 number, since 3×43231973929³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43231973429) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 103962 + ... + 311884.

Almost surely, 2^43231973929 is an apocalyptic number.

43231973929 is the 207923-rd square number.

43231973929 is the 103962-nd centered octagonal number.

It is an amenable number.

43231973929 is a deficient number, since it is larger than the sum of its proper divisors (207924).

43231973929 is an frugal number, since it uses more digits than its factorization.

43231973929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415846 (or 207923 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 52.

The spelling of 43231973929 in words is "forty-three billion, two hundred thirty-one million, nine hundred seventy-three thousand, nine hundred twenty-nine".