721800874 has 4 divisors (see below), whose sum is σ = 1082701314. Its totient is φ = 360900436.

The previous prime is 721800851. The next prime is 721800889. The reversal of 721800874 is 478008127.

721800874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 512796025 + 209004849 = 22645^2 + 14457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180450217 + ... + 180450220.

Almost surely, 2^721800874 is an apocalyptic number.

721800874 is a deficient number, since it is larger than the sum of its proper divisors (360900440).

721800874 is a wasteful number, since it uses less digits than its factorization.

721800874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360900439.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 721800874 is about 26866.3520783898. The cubic root of 721800874 is about 897.0275906067.

The spelling of 721800874 in words is "seven hundred twenty-one million, eight hundred thousand, eight hundred seventy-four".