40470791 has 4 divisors (see below), whose sum is σ = 40567800. Its totient is φ = 40373784.

The previous prime is 40470743. The next prime is 40470797. The reversal of 40470791 is 19707404.

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 40470791 - 2¹⁸ = 40208647 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 (40470797) 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 3 ways as a sum of consecutive naturals, for example, 47876 + ... + 48713.

It is an arithmetic number, because the mean of its divisors is an integer number (10141950).

Almost surely, 2^40470791 is an apocalyptic number.

40470791 is a deficient number, since it is larger than the sum of its proper divisors (97009).

40470791 is an equidigital number, since it uses as much as digits as its factorization.

40470791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97008.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 40470791 is about 6361.6657409833. The cubic root of 40470791 is about 343.3316949891.

The spelling of 40470791 in words is "forty million, four hundred seventy thousand, seven hundred ninety-one".