720920195 has 4 divisors (see below), whose sum is σ = 865104240. Its totient is φ = 576736152.

The previous prime is 720920191. The next prime is 720920219. The reversal of 720920195 is 591029027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591029027 = 449 ⋅1316323.

It is a cyclic number.

It is not a de Polignac number, because 720920195 - 2² = 720920191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720920191) 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, 72092015 + ... + 72092024.

It is an arithmetic number, because the mean of its divisors is an integer number (216276060).

Almost surely, 2^720920195 is an apocalyptic number.

720920195 is a deficient number, since it is larger than the sum of its proper divisors (144184045).

720920195 is a wasteful number, since it uses less digits than its factorization.

720920195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144184044.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 720920195 is about 26849.9570763158. The cubic root of 720920195 is about 896.6626169685.

The spelling of 720920195 in words is "seven hundred twenty million, nine hundred twenty thousand, one hundred ninety-five".