100720447 has 2 divisors, whose sum is σ = 100720448. Its totient is φ = 100720446.

The previous prime is 100720441. The next prime is 100720453. The reversal of 100720447 is 744027001.

It is a balanced prime because it is at equal distance from previous prime (100720441) and next prime (100720453).

It is a cyclic number.

It is not a de Polignac number, because 100720447 - 2³ = 100720439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100720441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360223 + 50360224.

It is an arithmetic number, because the mean of its divisors is an integer number (50360224).

Almost surely, 2^100720447 is an apocalyptic number.

100720447 is a deficient number, since it is larger than the sum of its proper divisors (1).

100720447 is an equidigital number, since it uses as much as digits as its factorization.

100720447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 100720447 is about 10035.9577021827. The cubic root of 100720447 is about 465.2708900652.

Adding to 100720447 its reverse (744027001), we get a palindrome (844747448).

The spelling of 100720447 in words is "one hundred million, seven hundred twenty thousand, four hundred forty-seven".