720850871 has 4 divisors (see below), whose sum is σ = 776300952. Its totient is φ = 665400792.

The previous prime is 720850829. The next prime is 720850873. The reversal of 720850871 is 178058027.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720850871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720850873) 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, 27725021 + ... + 27725046.

It is an arithmetic number, because the mean of its divisors is an integer number (194075238).

Almost surely, 2^720850871 is an apocalyptic number.

720850871 is a deficient number, since it is larger than the sum of its proper divisors (55450081).

720850871 is a wasteful number, since it uses less digits than its factorization.

720850871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55450080.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 720850871 is about 26848.6660934952. Note that the first 3 decimals coincide. The cubic root of 720850871 is about 896.6338748912.

The spelling of 720850871 in words is "seven hundred twenty million, eight hundred fifty thousand, eight hundred seventy-one".