40299943 has 4 divisors (see below), whose sum is σ = 40312648. Its totient is φ = 40287240.

The previous prime is 40299863. The next prime is 40299949. The reversal of 40299943 is 34999204.

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 a cyclic number.

It is not a de Polignac number, because 40299943 - 2¹⁷ = 40168871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40299896 and 40299905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40299949) 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, 2848 + ... + 9418.

It is an arithmetic number, because the mean of its divisors is an integer number (10078162).

Almost surely, 2^40299943 is an apocalyptic number.

40299943 is a deficient number, since it is larger than the sum of its proper divisors (12705).

40299943 is an equidigital number, since it uses as much as digits as its factorization.

40299943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12704.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 40299943 is about 6348.2236097983. The cubic root of 40299943 is about 342.8478870600.

The spelling of 40299943 in words is "forty million, two hundred ninety-nine thousand, nine hundred forty-three".