40497917 has 4 divisors (see below), whose sum is σ = 42258720. Its totient is φ = 38737116.

The previous prime is 40497913. The next prime is 40497923. The reversal of 40497917 is 71979404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40497917 - 2² = 40497913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40497913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880367 + ... + 880412.

It is an arithmetic number, because the mean of its divisors is an integer number (10564680).

Almost surely, 2^40497917 is an apocalyptic number.

It is an amenable number.

40497917 is a deficient number, since it is larger than the sum of its proper divisors (1760803).

40497917 is a wasteful number, since it uses less digits than its factorization.

40497917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760802.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 40497917 is about 6363.7973726384. The cubic root of 40497917 is about 343.4083851595.

It can be divided in two parts, 40497 and 917, that added together give a palindrome (41414).

The spelling of 40497917 in words is "forty million, four hundred ninety-seven thousand, nine hundred seventeen".