72247487 has 4 divisors (see below), whose sum is σ = 77805000. Its totient is φ = 66689976.

The previous prime is 72247463. The next prime is 72247499. The reversal of 72247487 is 78474227.

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 72247487 - 2⁶ = 72247423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72247457) 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, 2778737 + ... + 2778762.

It is an arithmetic number, because the mean of its divisors is an integer number (19451250).

Almost surely, 2^72247487 is an apocalyptic number.

72247487 is a deficient number, since it is larger than the sum of its proper divisors (5557513).

72247487 is a wasteful number, since it uses less digits than its factorization.

72247487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557512.

The product of its digits is 175616, while the sum is 41.

The square root of 72247487 is about 8499.8521751852. The cubic root of 72247487 is about 416.4928803438.

The spelling of 72247487 in words is "seventy-two million, two hundred forty-seven thousand, four hundred eighty-seven".