40143793 has 4 divisors (see below), whose sum is σ = 40368240. Its totient is φ = 39919348.

The previous prime is 40143773. The next prime is 40143799. The reversal of 40143793 is 39734104.

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 a de Polignac number, because none of the positive numbers 2^k-40143793 is a prime.

It is a super-2 number, since 2×40143793² = 3223048232853698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40143799) 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, 111955 + ... + 112312.

It is an arithmetic number, because the mean of its divisors is an integer number (10092060).

Almost surely, 2^40143793 is an apocalyptic number.

It is an amenable number.

40143793 is a deficient number, since it is larger than the sum of its proper divisors (224447).

40143793 is a wasteful number, since it uses less digits than its factorization.

40143793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224446.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 40143793 is about 6335.9129571041. The cubic root of 40143793 is about 342.4045035410.

Adding to 40143793 its reverse (39734104), we get a palindrome (79877897).

The spelling of 40143793 in words is "forty million, one hundred forty-three thousand, seven hundred ninety-three".