729688922 has 4 divisors (see below), whose sum is σ = 1094533386. Its totient is φ = 364844460.

The previous prime is 729688903. The next prime is 729688933. The reversal of 729688922 is 229886927.

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., 643180321 + 86508601 = 25361^2 + 9301^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182422229 + ... + 182422232.

Almost surely, 2^729688922 is an apocalyptic number.

729688922 is a deficient number, since it is larger than the sum of its proper divisors (364844464).

729688922 is a wasteful number, since it uses less digits than its factorization.

729688922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364844463.

The product of its digits is 1741824, while the sum is 53.

The square root of 729688922 is about 27012.7548021300. The cubic root of 729688922 is about 900.2834177358.

The spelling of 729688922 in words is "seven hundred twenty-nine million, six hundred eighty-eight thousand, nine hundred twenty-two".