40164091 has 4 divisors (see below), whose sum is σ = 43815384. Its totient is φ = 36512800.

The previous prime is 40164079. The next prime is 40164109. The reversal of 40164091 is 19046104.

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 40164091 - 2¹⁵ = 40131323 is a prime.

It is a super-2 number, since 2×40164091² = 3226308411712562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40164031) 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, 1825630 + ... + 1825651.

It is an arithmetic number, because the mean of its divisors is an integer number (10953846).

Almost surely, 2^40164091 is an apocalyptic number.

40164091 is a deficient number, since it is larger than the sum of its proper divisors (3651293).

40164091 is a wasteful number, since it uses less digits than its factorization.

40164091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651292.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40164091 is about 6337.5145759201. The cubic root of 40164091 is about 342.4622040805.

The spelling of 40164091 in words is "forty million, one hundred sixty-four thousand, ninety-one".