40709191 has 8 divisors (see below), whose sum is σ = 43764480. Its totient is φ = 37745208.

The previous prime is 40709177. The next prime is 40709197. The reversal of 40709191 is 19190704.

40709191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40709191 - 2⁷ = 40709063 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 (40709197) 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 7 ways as a sum of consecutive naturals, for example, 21901 + ... + 23686.

It is an arithmetic number, because the mean of its divisors is an integer number (5470560).

Almost surely, 2^40709191 is an apocalyptic number.

40709191 is a deficient number, since it is larger than the sum of its proper divisors (3055289).

40709191 is a wasteful number, since it uses less digits than its factorization.

40709191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45653.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 40709191 is about 6380.3754591717. The cubic root of 40709191 is about 344.0045265990.

Adding to 40709191 its reverse (19190704), we get a palindrome (59899895).

The spelling of 40709191 in words is "forty million, seven hundred nine thousand, one hundred ninety-one".