72303537 has 4 divisors (see below), whose sum is σ = 96404720. Its totient is φ = 48202356.

The previous prime is 72303529. The next prime is 72303547. The reversal of 72303537 is 73530327.

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 72303537 - 2³ = 72303529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72303547) 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 3 ways as a sum of consecutive naturals, for example, 12050587 + ... + 12050592.

It is an arithmetic number, because the mean of its divisors is an integer number (24101180).

Almost surely, 2^72303537 is an apocalyptic number.

It is an amenable number.

72303537 is a deficient number, since it is larger than the sum of its proper divisors (24101183).

72303537 is a wasteful number, since it uses less digits than its factorization.

72303537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24101182.

The product of its (nonzero) digits is 13230, while the sum is 30.

The square root of 72303537 is about 8503.1486521170. The cubic root of 72303537 is about 416.6005583296.

The spelling of 72303537 in words is "seventy-two million, three hundred three thousand, five hundred thirty-seven".