40906091 has 4 divisors (see below), whose sum is σ = 41365800. Its totient is φ = 40446384.

The previous prime is 40906079. The next prime is 40906093. The reversal of 40906091 is 19060904.

40906091 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 40906091 - 2¹⁴ = 40889707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40906093) 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, 229721 + ... + 229898.

It is an arithmetic number, because the mean of its divisors is an integer number (10341450).

Almost surely, 2^40906091 is an apocalyptic number.

40906091 is a deficient number, since it is larger than the sum of its proper divisors (459709).

40906091 is an equidigital number, since it uses as much as digits as its factorization.

40906091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459708.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 40906091 is about 6395.7869726876. The cubic root of 40906091 is about 344.5582555997.

Adding to 40906091 its reverse (19060904), we get a palindrome (59966995).

The spelling of 40906091 in words is "forty million, nine hundred six thousand, ninety-one".