72112577 has 4 divisors (see below), whose sum is σ = 72208596. Its totient is φ = 72016560.

The previous prime is 72112561. The next prime is 72112583. The reversal of 72112577 is 77521127.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23726641 + 48385936 = 4871^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 72112577 - 2⁴ = 72112561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72112507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46874 + ... + 48387.

It is an arithmetic number, because the mean of its divisors is an integer number (18052149).

Almost surely, 2^72112577 is an apocalyptic number.

It is an amenable number.

72112577 is a deficient number, since it is larger than the sum of its proper divisors (96019).

72112577 is an equidigital number, since it uses as much as digits as its factorization.

72112577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96018.

The product of its digits is 6860, while the sum is 32.

The square root of 72112577 is about 8491.9124465576. The cubic root of 72112577 is about 416.2334754026.

The spelling of 72112577 in words is "seventy-two million, one hundred twelve thousand, five hundred seventy-seven".