40097723 has 4 divisors (see below), whose sum is σ = 40175208. Its totient is φ = 40020240.

The previous prime is 40097719. The next prime is 40097737. The reversal of 40097723 is 32779004.

It is a happy number.

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 40097723 - 2² = 40097719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40097723.

It is not an unprimeable number, because it can be changed into a prime (40097753) 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, 37961 + ... + 39002.

It is an arithmetic number, because the mean of its divisors is an integer number (10043802).

Almost surely, 2^40097723 is an apocalyptic number.

40097723 is a deficient number, since it is larger than the sum of its proper divisors (77485).

40097723 is an equidigital number, since it uses as much as digits as its factorization.

40097723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77484.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 40097723 is about 6332.2762889817. The cubic root of 40097723 is about 342.2734694709.

The spelling of 40097723 in words is "forty million, ninety-seven thousand, seven hundred twenty-three".