40193191 has 4 divisors (see below), whose sum is σ = 40210384. Its totient is φ = 40176000.

The previous prime is 40193183. The next prime is 40193203. The reversal of 40193191 is 19139104.

It is a happy number.

40193191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40193191 - 2³ = 40193183 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 (40193141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4410 + ... + 9991.

It is an arithmetic number, because the mean of its divisors is an integer number (10052596).

Almost surely, 2^40193191 is an apocalyptic number.

40193191 is a deficient number, since it is larger than the sum of its proper divisors (17193).

40193191 is a wasteful number, since it uses less digits than its factorization.

40193191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17192.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 40193191 is about 6339.8100129263. The cubic root of 40193191 is about 342.5448919082.

The spelling of 40193191 in words is "forty million, one hundred ninety-three thousand, one hundred ninety-one".