72511117 has 8 divisors (see below), whose sum is σ = 82922112. Its totient is φ = 62113200.

The previous prime is 72511091. The next prime is 72511129. The reversal of 72511117 is 71111527.

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 72511117 - 2¹¹ = 72509069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72511091 and 72511100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511147) 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, 17067 + ... + 20887.

It is an arithmetic number, because the mean of its divisors is an integer number (10365264).

Almost surely, 2^72511117 is an apocalyptic number.

It is an amenable number.

72511117 is a deficient number, since it is larger than the sum of its proper divisors (10410995).

72511117 is a wasteful number, since it uses less digits than its factorization.

72511117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539.

The product of its digits is 490, while the sum is 25.

The square root of 72511117 is about 8515.3459706579. The cubic root of 72511117 is about 416.9988575056.

The spelling of 72511117 in words is "seventy-two million, five hundred eleven thousand, one hundred seventeen".