720700173 has 60 divisors (see below), whose sum is σ = 1134147520. Its totient is φ = 455906880.

The previous prime is 720700151. The next prime is 720700207. The reversal of 720700173 is 371007027.

It is not a de Polignac number, because 720700173 - 2¹³ = 720691981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720700133) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9122748 + ... + 9122826.

Almost surely, 2^720700173 is an apocalyptic number.

It is an amenable number.

720700173 is a deficient number, since it is larger than the sum of its proper divisors (413447347).

720700173 is an equidigital number, since it uses as much as digits as its factorization.

720700173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 720700173 is about 26845.8595131540. The cubic root of 720700173 is about 896.5713883890.

The spelling of 720700173 in words is "seven hundred twenty million, seven hundred thousand, one hundred seventy-three".