40073 has 4 divisors (see below), whose sum is σ = 43728. Its totient is φ = 36420.

The previous prime is 40063. The next prime is 40087. The reversal of 40073 is 37004.

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 40073 - 2⁶ = 40009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (40013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811 + ... + 1832.

It is an arithmetic number, because the mean of its divisors is an integer number (10932).

2⁴⁰⁰⁷³ is an apocalyptic number.

It is an amenable number.

40073 is a deficient number, since it is larger than the sum of its proper divisors (3655).

40073 is a wasteful number, since it uses less digits than its factorization.

40073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 40073 is about 200.1824168103. The cubic root of 40073 is about 34.2203109975.

Adding to 40073 its reverse (37004), we get a palindrome (77077).

It can be divided in two parts, 4007 and 3, that multiplied together give a palindrome (12021).

The spelling of 40073 in words is "forty thousand, seventy-three", and thus it is an iban number.