4043320397 has 4 divisors (see below), whose sum is σ = 4219116960. Its totient is φ = 3867523836.

The previous prime is 4043320367. The next prime is 4043320399. The reversal of 4043320397 is 7930233404.

It is a happy number.

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 not a de Polignac number, because 4043320397 - 2¹⁶ = 4043254861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4043320399) 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, 87898247 + ... + 87898292.

It is an arithmetic number, because the mean of its divisors is an integer number (1054779240).

Almost surely, 2^4043320397 is an apocalyptic number.

It is an amenable number.

4043320397 is a deficient number, since it is larger than the sum of its proper divisors (175796563).

4043320397 is a wasteful number, since it uses less digits than its factorization.

4043320397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175796562.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 4043320397 is about 63587.1087328241. The cubic root of 4043320397 is about 1593.1110583135. Note that the first 3 decimals are identical.

The spelling of 4043320397 in words is "four billion, forty-three million, three hundred twenty thousand, three hundred ninety-seven".