720920127 has 4 divisors (see below), whose sum is σ = 961226840. Its totient is φ = 480613416.

The previous prime is 720920107. The next prime is 720920147. The reversal of 720920127 is 721029027.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (720920107) and next prime (720920147).

It is not a de Polignac number, because 720920127 - 2⁶ = 720920063 is a prime.

It is a super-2 number, since 2×720920127² = 1039451659027392258, 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 = 720920094 and 720920103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720920107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120153352 + ... + 120153357.

It is an arithmetic number, because the mean of its divisors is an integer number (240306710).

Almost surely, 2^720920127 is an apocalyptic number.

720920127 is a deficient number, since it is larger than the sum of its proper divisors (240306713).

720920127 is a wasteful number, since it uses less digits than its factorization.

720920127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240306712.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 720920127 is about 26849.9558100195. The cubic root of 720920127 is about 896.6625887762.

Subtracting 720920127 from its reverse (721029027), we obtain a square (108900 = 330²).

The spelling of 720920127 in words is "seven hundred twenty million, nine hundred twenty thousand, one hundred twenty-seven".