40540897 has 4 divisors (see below), whose sum is σ = 40899780. Its totient is φ = 40182016.

The previous prime is 40540883. The next prime is 40540921. The reversal of 40540897 is 79804504.

40540897 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 can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 39450961 = 1044^2 + 6281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40540897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40540807) 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, 179272 + ... + 179497.

It is an arithmetic number, because the mean of its divisors is an integer number (10224945).

Almost surely, 2^40540897 is an apocalyptic number.

It is an amenable number.

40540897 is a deficient number, since it is larger than the sum of its proper divisors (358883).

40540897 is a wasteful number, since it uses less digits than its factorization.

40540897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358882.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40540897 is about 6367.1733917022. The cubic root of 40540897 is about 343.5298274058.

The spelling of 40540897 in words is "forty million, five hundred forty thousand, eight hundred ninety-seven".