729102991922 has 6 divisors (see below), whose sum is σ = 1093656299229. Its totient is φ = 364550892180.

The previous prime is 729102991907. The next prime is 729102991933. The reversal of 729102991922 is 229199201927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 719224421041 + 9878570881 = 848071^2 + 99391^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=603781.

It is a super-2 number, since 2×729102991922² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 905672 + ... + 1509452.

Almost surely, 2^729102991922 is an apocalyptic number.

729102991922 is a deficient number, since it is larger than the sum of its proper divisors (364553307307).

729102991922 is an frugal number, since it uses more digits than its factorization.

729102991922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207564 (or 603783 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 729102991922 in words is "seven hundred twenty-nine billion, one hundred two million, nine hundred ninety-one thousand, nine hundred twenty-two".