40106091 has 4 divisors (see below), whose sum is σ = 53474792. Its totient is φ = 26737392.

The previous prime is 40106083. The next prime is 40106123. The reversal of 40106091 is 19060104.

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

It is not a de Polignac number, because 40106091 - 2³ = 40106083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40106021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6684346 + ... + 6684351.

It is an arithmetic number, because the mean of its divisors is an integer number (13368698).

Almost surely, 2^40106091 is an apocalyptic number.

40106091 is a deficient number, since it is larger than the sum of its proper divisors (13368701).

40106091 is a wasteful number, since it uses less digits than its factorization.

40106091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13368700.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 40106091 is about 6332.9369963706. The cubic root of 40106091 is about 342.2972775158.

Adding to 40106091 its reverse (19060104), we get a palindrome (59166195).

It can be divided in two parts, 4010 and 6091, that added together give a palindrome (10101).

The spelling of 40106091 in words is "forty million, one hundred six thousand, ninety-one".