72207617 has 4 divisors (see below), whose sum is σ = 72404736. Its totient is φ = 72010500.

The previous prime is 72207613. The next prime is 72207637. The reversal of 72207617 is 71670227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72207617 - 2² = 72207613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72207613) 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, 98009 + ... + 98742.

It is an arithmetic number, because the mean of its divisors is an integer number (18101184).

Almost surely, 2^72207617 is an apocalyptic number.

It is an amenable number.

72207617 is a deficient number, since it is larger than the sum of its proper divisors (197119).

72207617 is a wasteful number, since it uses less digits than its factorization.

72207617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197118.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 72207617 is about 8497.5065166200. The cubic root of 72207617 is about 416.4162519499.

The spelling of 72207617 in words is "seventy-two million, two hundred seven thousand, six hundred seventeen".