72047505 has 8 divisors (see below), whose sum is σ = 115276032. Its totient is φ = 38425328.

The previous prime is 72047501. The next prime is 72047531. The reversal of 72047505 is 50574027.

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 72047505 - 2² = 72047501 is a prime.

It is a super-3 number, since 3×72047505³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72047501) 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 7 ways as a sum of consecutive naturals, for example, 2401569 + ... + 2401598.

It is an arithmetic number, because the mean of its divisors is an integer number (14409504).

Almost surely, 2^72047505 is an apocalyptic number.

It is an amenable number.

72047505 is a deficient number, since it is larger than the sum of its proper divisors (43228527).

72047505 is a wasteful number, since it uses less digits than its factorization.

72047505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803175.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72047505 is about 8488.0801716289. The cubic root of 72047505 is about 416.1082392934.

The spelling of 72047505 in words is "seventy-two million, forty-seven thousand, five hundred five".