40608091 has 4 divisors (see below), whose sum is σ = 42008400. Its totient is φ = 39207784.

The previous prime is 40608089. The next prime is 40608101. The reversal of 40608091 is 19080604.

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 40608091 - 2¹ = 40608089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40608011) 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, 700111 + ... + 700168.

It is an arithmetic number, because the mean of its divisors is an integer number (10502100).

Almost surely, 2^40608091 is an apocalyptic number.

40608091 is a deficient number, since it is larger than the sum of its proper divisors (1400309).

40608091 is a wasteful number, since it uses less digits than its factorization.

40608091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400308.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 40608091 is about 6372.4478028463. The cubic root of 40608091 is about 343.7195157099.

Adding to 40608091 its reverse (19080604), we get a palindrome (59688695).

The spelling of 40608091 in words is "forty million, six hundred eight thousand, ninety-one".