30722026729 has 3 divisors (see below), whose sum is σ = 30722202007. Its totient is φ = 30721851452.

The previous prime is 30722026723. The next prime is 30722026817. The reversal of 30722026729 is 92762022703.

The square root of 30722026729 is 175277.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10001000025 + 20721026704 = 100005^2 + 143948^2 .

It is not a de Polignac number, because 30722026729 - 2¹⁵ = 30721993961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30722026691 and 30722026700.

It is not an unprimeable number, because it can be changed into a prime (30722026723) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87639 + ... + 262915.

Almost surely, 2^30722026729 is an apocalyptic number.

30722026729 is the 175277-th square number.

30722026729 is the 87639-th centered octagonal number.

It is an amenable number.

30722026729 is a deficient number, since it is larger than the sum of its proper divisors (175278).

30722026729 is an frugal number, since it uses more digits than its factorization.

30722026729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350554 (or 175277 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 30722026729 in words is "thirty billion, seven hundred twenty-two million, twenty-six thousand, seven hundred twenty-nine".