72196537 has 4 divisors (see below), whose sum is σ = 82510336. Its totient is φ = 61882740.

The previous prime is 72196529. The next prime is 72196543. The reversal of 72196537 is 73569127.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73569127 = 3989 ⋅18443.

It is a cyclic number.

It is not a de Polignac number, because 72196537 - 2³ = 72196529 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 72196537.

It is not an unprimeable number, because it can be changed into a prime (72196507) 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, 5156889 + ... + 5156902.

It is an arithmetic number, because the mean of its divisors is an integer number (20627584).

Almost surely, 2^72196537 is an apocalyptic number.

It is an amenable number.

72196537 is a deficient number, since it is larger than the sum of its proper divisors (10313799).

72196537 is a wasteful number, since it uses less digits than its factorization.

72196537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313798.

The product of its digits is 79380, while the sum is 40.

The square root of 72196537 is about 8496.8545356502. The cubic root of 72196537 is about 416.3949516666.

The spelling of 72196537 in words is "seventy-two million, one hundred ninety-six thousand, five hundred thirty-seven".