720113131 has 4 divisors (see below), whose sum is σ = 736859992. Its totient is φ = 703366272.

The previous prime is 720113101. The next prime is 720113189. The reversal of 720113131 is 131311027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720113131 - 2¹⁵ = 720080363 is a prime.

It is a super-2 number, since 2×720113131² = 1037125842877246322, 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 = 720113099 and 720113108.

It is not an unprimeable number, because it can be changed into a prime (720113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8373366 + ... + 8373451.

It is an arithmetic number, because the mean of its divisors is an integer number (184214998).

Almost surely, 2^720113131 is an apocalyptic number.

720113131 is a deficient number, since it is larger than the sum of its proper divisors (16746861).

720113131 is a wasteful number, since it uses less digits than its factorization.

720113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16746860.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 720113131 is about 26834.9237189152. The cubic root of 720113131 is about 896.3278899826.

Adding to 720113131 its reverse (131311027), we get a palindrome (851424158).

The spelling of 720113131 in words is "seven hundred twenty million, one hundred thirteen thousand, one hundred thirty-one".