40945091 has 16 divisors (see below), whose sum is σ = 45830400. Its totient is φ = 36266400.

The previous prime is 40945081. The next prime is 40945103. The reversal of 40945091 is 19054904.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40945091 is a prime.

It is a super-3 number, since 3×40945091³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40945001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93050 + ... + 93488.

It is an arithmetic number, because the mean of its divisors is an integer number (2864400).

Almost surely, 2^40945091 is an apocalyptic number.

40945091 is a deficient number, since it is larger than the sum of its proper divisors (4885309).

40945091 is a wasteful number, since it uses less digits than its factorization.

40945091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40945091 is about 6398.8351283652. The cubic root of 40945091 is about 344.6677218052.

Adding to 40945091 its reverse (19054904), we get a palindrome (59999995).

The spelling of 40945091 in words is "forty million, nine hundred forty-five thousand, ninety-one".