40191047 has 8 divisors (see below), whose sum is σ = 43336944. Its totient is φ = 37052928.

The previous prime is 40191001. The next prime is 40191059. The reversal of 40191047 is 74019104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40191047 - 2⁸ = 40190791 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 (40191647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13223 + ... + 15975.

It is an arithmetic number, because the mean of its divisors is an integer number (5417118).

Almost surely, 2^40191047 is an apocalyptic number.

40191047 is a deficient number, since it is larger than the sum of its proper divisors (3145897).

40191047 is a wasteful number, since it uses less digits than its factorization.

40191047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 40191047 is about 6339.6409204307. The cubic root of 40191047 is about 342.5388010813.

The spelling of 40191047 in words is "forty million, one hundred ninety-one thousand, forty-seven".