72071101 has 2 divisors, whose sum is σ = 72071102. Its totient is φ = 72071100.

The previous prime is 72071039. The next prime is 72071107. The reversal of 72071101 is 10117027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61638201 + 10432900 = 7851^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 72071101 - 2²¹ = 69973949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72071107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035550 + 36035551.

It is an arithmetic number, because the mean of its divisors is an integer number (36035551).

Almost surely, 2^72071101 is an apocalyptic number.

It is an amenable number.

72071101 is a deficient number, since it is larger than the sum of its proper divisors (1).

72071101 is an equidigital number, since it uses as much as digits as its factorization.

72071101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 72071101 is about 8489.4700070146. The cubic root of 72071101 is about 416.1536603358.

Adding to 72071101 its reverse (10117027), we get a palindrome (82188128).

The spelling of 72071101 in words is "seventy-two million, seventy-one thousand, one hundred one".