72537191 has 2 divisors, whose sum is σ = 72537192. Its totient is φ = 72537190.

The previous prime is 72537167. The next prime is 72537197. The reversal of 72537191 is 19173527.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72537191 - 2¹⁴ = 72520807 is a prime.

It is a super-3 number, since 3×72537191³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72537197) 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 as a sum of consecutive naturals, namely, 36268595 + 36268596.

It is an arithmetic number, because the mean of its divisors is an integer number (36268596).

Almost surely, 2^72537191 is an apocalyptic number.

72537191 is a deficient number, since it is larger than the sum of its proper divisors (1).

72537191 is an equidigital number, since it uses as much as digits as its factorization.

72537191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 35.

The square root of 72537191 is about 8516.8768336756. The cubic root of 72537191 is about 417.0488338664.

The spelling of 72537191 in words is "seventy-two million, five hundred thirty-seven thousand, one hundred ninety-one".