72947527 has 4 divisors (see below), whose sum is σ = 77238576. Its totient is φ = 68656480.

The previous prime is 72947519. The next prime is 72947543. The reversal of 72947527 is 72574927.

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 72947527 - 2³ = 72947519 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 (72947827) 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, 2145499 + ... + 2145532.

It is an arithmetic number, because the mean of its divisors is an integer number (19309644).

Almost surely, 2^72947527 is an apocalyptic number.

72947527 is a deficient number, since it is larger than the sum of its proper divisors (4291049).

72947527 is a wasteful number, since it uses less digits than its factorization.

72947527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291048.

The product of its digits is 246960, while the sum is 43.

The square root of 72947527 is about 8540.9324432406. The cubic root of 72947527 is about 417.8337575230.

The spelling of 72947527 in words is "seventy-two million, nine hundred forty-seven thousand, five hundred twenty-seven".