720870131 has 4 divisors (see below), whose sum is σ = 721465632. Its totient is φ = 720274632.

The previous prime is 720870121. The next prime is 720870167. The reversal of 720870131 is 131078027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131078027 = 467 ⋅280681.

It is a cyclic number.

It is not a de Polignac number, because 720870131 - 2¹⁴ = 720853747 is a prime.

It is a super-2 number, since 2×720870131² = 1039307491535914322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720870094 and 720870103.

It is not an unprimeable number, because it can be changed into a prime (720870121) 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, 295931 + ... + 298356.

It is an arithmetic number, because the mean of its divisors is an integer number (180366408).

Almost surely, 2^720870131 is an apocalyptic number.

720870131 is a deficient number, since it is larger than the sum of its proper divisors (595501).

720870131 is a wasteful number, since it uses less digits than its factorization.

720870131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595500.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 720870131 is about 26849.0247681364. The cubic root of 720870131 is about 896.6418603684.

The spelling of 720870131 in words is "seven hundred twenty million, eight hundred seventy thousand, one hundred thirty-one".