72307017 has 6 divisors (see below), whose sum is σ = 104443482. Its totient is φ = 48204672.

The previous prime is 72307007. The next prime is 72307019. The reversal of 72307017 is 71070327.

It can be written as a sum of positive squares in only one way, i.e., 56791296 + 15515721 = 7536^2 + 3939^2 .

It is not a de Polignac number, because 72307017 - 2¹⁸ = 72044873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72307019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4017048 + ... + 4017065.

It is an arithmetic number, because the mean of its divisors is an integer number (17407247).

Almost surely, 2^72307017 is an apocalyptic number.

It is an amenable number.

72307017 is a deficient number, since it is larger than the sum of its proper divisors (32136465).

72307017 is a wasteful number, since it uses less digits than its factorization.

72307017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034119 (or 8034116 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 72307017 is about 8503.3532797362. The cubic root of 72307017 is about 416.6072419431.

The spelling of 72307017 in words is "seventy-two million, three hundred seven thousand, seventeen".