720135361 has 4 divisors (see below), whose sum is σ = 785602224. Its totient is φ = 654668500.

The previous prime is 720135289. The next prime is 720135373. The reversal of 720135361 is 163531027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 720135361 - 2²⁵ = 686580929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720135391) 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, 32733415 + ... + 32733436.

It is an arithmetic number, because the mean of its divisors is an integer number (196400556).

Almost surely, 2^720135361 is an apocalyptic number.

It is an amenable number.

720135361 is a deficient number, since it is larger than the sum of its proper divisors (65466863).

720135361 is a wasteful number, since it uses less digits than its factorization.

720135361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65466862.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 720135361 is about 26835.3379147720. The cubic root of 720135361 is about 896.3371131464.

Adding to 720135361 its reverse (163531027), we get a palindrome (883666388).

The spelling of 720135361 in words is "seven hundred twenty million, one hundred thirty-five thousand, three hundred sixty-one".