40043197 has 4 divisors (see below), whose sum is σ = 40117756. Its totient is φ = 39968640.

The previous prime is 40043189. The next prime is 40043209. The reversal of 40043197 is 79134004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29713401 + 10329796 = 5451^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 40043197 - 2³ = 40043189 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 (40043117) 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, 36468 + ... + 37549.

It is an arithmetic number, because the mean of its divisors is an integer number (10029439).

Almost surely, 2^40043197 is an apocalyptic number.

It is an amenable number.

40043197 is a deficient number, since it is larger than the sum of its proper divisors (74559).

40043197 is an equidigital number, since it uses as much as digits as its factorization.

40043197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74558.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40043197 is about 6327.9694215443. The cubic root of 40043197 is about 342.1182547638.

The spelling of 40043197 in words is "forty million, forty-three thousand, one hundred ninety-seven".