72107801 has 2 divisors, whose sum is σ = 72107802. Its totient is φ = 72107800.

The previous prime is 72107797. The next prime is 72107821. The reversal of 72107801 is 10870127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 265225 = 8476^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 72107801 - 2² = 72107797 is a prime.

It is not a weakly prime, because it can be changed into another prime (72107821) 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 as a sum of consecutive naturals, namely, 36053900 + 36053901.

It is an arithmetic number, because the mean of its divisors is an integer number (36053901).

Almost surely, 2^72107801 is an apocalyptic number.

It is an amenable number.

72107801 is a deficient number, since it is larger than the sum of its proper divisors (1).

72107801 is an equidigital number, since it uses as much as digits as its factorization.

72107801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 72107801 is about 8491.6312331613. The cubic root of 72107801 is about 416.2242861828.

Adding to 72107801 its reverse (10870127), we get a palindrome (82977928).

The spelling of 72107801 in words is "seventy-two million, one hundred seven thousand, eight hundred one".