72519247 has 4 divisors (see below), whose sum is σ = 73334160. Its totient is φ = 71704336.

The previous prime is 72519241. The next prime is 72519269. The reversal of 72519247 is 74291527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72519247 - 2¹⁹ = 71994959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72519241) 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, 407323 + ... + 407500.

It is an arithmetic number, because the mean of its divisors is an integer number (18333540).

Almost surely, 2^72519247 is an apocalyptic number.

72519247 is a deficient number, since it is larger than the sum of its proper divisors (814913).

72519247 is an equidigital number, since it uses as much as digits as its factorization.

72519247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814912.

The product of its digits is 35280, while the sum is 37.

The square root of 72519247 is about 8515.8233307179. The cubic root of 72519247 is about 417.0144416631.

The spelling of 72519247 in words is "seventy-two million, five hundred nineteen thousand, two hundred forty-seven".