72419537 has 4 divisors (see below), whose sum is σ = 73336320. Its totient is φ = 71502756.

The previous prime is 72419533. The next prime is 72419561. The reversal of 72419537 is 73591427.

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 a cyclic number.

It is not a de Polignac number, because 72419537 - 2² = 72419533 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 72419537.

It is not an unprimeable number, because it can be changed into a prime (72419533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458273 + ... + 458430.

It is an arithmetic number, because the mean of its divisors is an integer number (18334080).

Almost surely, 2^72419537 is an apocalyptic number.

It is an amenable number.

72419537 is a deficient number, since it is larger than the sum of its proper divisors (916783).

72419537 is an equidigital number, since it uses as much as digits as its factorization.

72419537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916782.

The product of its digits is 52920, while the sum is 38.

The square root of 72419537 is about 8509.9669212048. The cubic root of 72419537 is about 416.8232299814.

The spelling of 72419537 in words is "seventy-two million, four hundred nineteen thousand, five hundred thirty-seven".