720081873 has 16 divisors (see below), whose sum is σ = 1219186560. Its totient is φ = 411475248.

The previous prime is 720081871. The next prime is 720081883. The reversal of 720081873 is 378180027.

It is not a de Polignac number, because 720081873 - 2¹ = 720081871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720081871) 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 15 ways as a sum of consecutive naturals, for example, 1904790 + ... + 1905167.

It is an arithmetic number, because the mean of its divisors is an integer number (76199160).

Almost surely, 2^720081873 is an apocalyptic number.

It is an amenable number.

720081873 is a deficient number, since it is larger than the sum of its proper divisors (499104687).

720081873 is a wasteful number, since it uses less digits than its factorization.

720081873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809973 (or 3809967 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 720081873 is about 26834.3412999090. The cubic root of 720081873 is about 896.3149208063.

The spelling of 720081873 in words is "seven hundred twenty million, eighty-one thousand, eight hundred seventy-three".