40043199997 has 4 divisors (see below), whose sum is σ = 40052057760. Its totient is φ = 40034342236.

The previous prime is 40043199991. The next prime is 40043200009. The reversal of 40043199997 is 79999134004.

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 40043199997 - 2²³ = 40034811389 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 (40043199991) 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, 4422097 + ... + 4431142.

It is an arithmetic number, because the mean of its divisors is an integer number (10013014440).

Almost surely, 2^40043199997 is an apocalyptic number.

It is an amenable number.

40043199997 is a deficient number, since it is larger than the sum of its proper divisors (8857763).

40043199997 is an equidigital number, since it uses as much as digits as its factorization.

40043199997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857762.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 40043199997 in words is "forty billion, forty-three million, one hundred ninety-nine thousand, nine hundred ninety-seven".