72447447 has 8 divisors (see below), whose sum is σ = 100796544. Its totient is φ = 46198328.

The previous prime is 72447433. The next prime is 72447461. The reversal of 72447447 is 74474427.

It is an interprime number because it is at equal distance from previous prime (72447433) and next prime (72447461).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72447447 - 2¹⁴ = 72431063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72447407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524913 + ... + 525050.

It is an arithmetic number, because the mean of its divisors is an integer number (12599568).

Almost surely, 2^72447447 is an apocalyptic number.

72447447 is a deficient number, since it is larger than the sum of its proper divisors (28349097).

72447447 is a wasteful number, since it uses less digits than its factorization.

72447447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049989.

The product of its digits is 175616, while the sum is 39.

The square root of 72447447 is about 8511.6066051011. The cubic root of 72447447 is about 416.8767700557.

The spelling of 72447447 in words is "seventy-two million, four hundred forty-seven thousand, four hundred forty-seven".