40449997 has 4 divisors (see below), whose sum is σ = 46228576. Its totient is φ = 34671420.

The previous prime is 40449989. The next prime is 40450027. The reversal of 40449997 is 79994404.

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 not a de Polignac number, because 40449997 - 2³ = 40449989 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 (40449697) 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, 2889279 + ... + 2889292.

It is an arithmetic number, because the mean of its divisors is an integer number (11557144).

Almost surely, 2^40449997 is an apocalyptic number.

It is an amenable number.

40449997 is a deficient number, since it is larger than the sum of its proper divisors (5778579).

40449997 is an equidigital number, since it uses as much as digits as its factorization.

40449997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778578.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 40449997 is about 6360.0312106152. The cubic root of 40449997 is about 343.2728833362.

It can be divided in two parts, 4044 and 9997, that added together give a palindrome (14041).

The spelling of 40449997 in words is "forty million, four hundred forty-nine thousand, nine hundred ninety-seven".