73973537 has 8 divisors (see below), whose sum is σ = 80760672. Its totient is φ = 67196800.

The previous prime is 73973521. The next prime is 73973567. The reversal of 73973537 is 73537937.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73973537 - 2⁴ = 73973521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73973567) 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 7 ways as a sum of consecutive naturals, for example, 26513 + ... + 29169.

It is an arithmetic number, because the mean of its divisors is an integer number (10095084).

Almost surely, 2^73973537 is an apocalyptic number.

It is an amenable number.

73973537 is a deficient number, since it is larger than the sum of its proper divisors (6787135).

73973537 is a wasteful number, since it uses less digits than its factorization.

73973537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5199.

The product of its digits is 416745, while the sum is 44.

The square root of 73973537 is about 8600.7869988740. The cubic root of 73973537 is about 419.7835941089.

Subtracting from 73973537 its reverse (73537937), we obtain a square (435600 = 660²).

The spelling of 73973537 in words is "seventy-three million, nine hundred seventy-three thousand, five hundred thirty-seven".