72607109 has 2 divisors, whose sum is σ = 72607110. Its totient is φ = 72607108.

The previous prime is 72607103. The next prime is 72607121. The reversal of 72607109 is 90170627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70930084 + 1677025 = 8422^2 + 1295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72607109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72607103) 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 as a sum of consecutive naturals, namely, 36303554 + 36303555.

It is an arithmetic number, because the mean of its divisors is an integer number (36303555).

Almost surely, 2^72607109 is an apocalyptic number.

It is an amenable number.

72607109 is a deficient number, since it is larger than the sum of its proper divisors (1).

72607109 is an equidigital number, since it uses as much as digits as its factorization.

72607109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 72607109 is about 8520.9805186962. The cubic root of 72607109 is about 417.1827874801.

The spelling of 72607109 in words is "seventy-two million, six hundred seven thousand, one hundred nine".