720218097 has 12 divisors (see below), whose sum is σ = 1040791284. Its totient is φ = 479925600.

The previous prime is 720218089. The next prime is 720218101. The reversal of 720218097 is 790812027.

It can be written as a sum of positive squares in 2 ways, for example, as 143065521 + 577152576 = 11961^2 + 24024^2 .

It is not a de Polignac number, because 720218097 - 2³ = 720218089 is a prime.

It is a super-3 number, since 3×720218097³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (720218027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3847 + ... + 38147.

It is an arithmetic number, because the mean of its divisors is an integer number (86732607).

Almost surely, 2^720218097 is an apocalyptic number.

It is an amenable number.

720218097 is a deficient number, since it is larger than the sum of its proper divisors (320573187).

720218097 is a wasteful number, since it uses less digits than its factorization.

720218097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36640 (or 36637 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 720218097 is about 26836.8794199326. The cubic root of 720218097 is about 896.3714384096.

The spelling of 720218097 in words is "seven hundred twenty million, two hundred eighteen thousand, ninety-seven".