720841105 has 4 divisors (see below), whose sum is σ = 865009332. Its totient is φ = 576672880.

The previous prime is 720841103. The next prime is 720841111. The reversal of 720841105 is 501148027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 364084561 + 356756544 = 19081^2 + 18888^2 .

It is not a de Polignac number, because 720841105 - 2¹ = 720841103 is a prime.

It is a super-2 number, since 2×720841105² = 1039223797315242050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720841103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72084106 + ... + 72084115.

It is an arithmetic number, because the mean of its divisors is an integer number (216252333).

Almost surely, 2^720841105 is an apocalyptic number.

It is an amenable number.

720841105 is a deficient number, since it is larger than the sum of its proper divisors (144168227).

720841105 is a wasteful number, since it uses less digits than its factorization.

720841105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144168226.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 720841105 is about 26848.4842216465. The cubic root of 720841105 is about 896.6298257107.

The spelling of 720841105 in words is "seven hundred twenty million, eight hundred forty-one thousand, one hundred five".