72088537 has 4 divisors (see below), whose sum is σ = 73846836. Its totient is φ = 70330240.

The previous prime is 72088529. The next prime is 72088559. The reversal of 72088537 is 73588027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73588027 = 5851 ⋅12577.

It can be written as a sum of positive squares in 2 ways, for example, as 36614601 + 35473936 = 6051^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 72088537 - 2³ = 72088529 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 72088537.

It is not an unprimeable number, because it can be changed into a prime (72088507) 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, 879088 + ... + 879169.

It is an arithmetic number, because the mean of its divisors is an integer number (18461709).

Almost surely, 2^72088537 is an apocalyptic number.

It is an amenable number.

72088537 is a deficient number, since it is larger than the sum of its proper divisors (1758299).

72088537 is a wasteful number, since it uses less digits than its factorization.

72088537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758298.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 72088537 is about 8490.4968641417. The cubic root of 72088537 is about 416.1872173374.

The spelling of 72088537 in words is "seventy-two million, eighty-eight thousand, five hundred thirty-seven".