30198445729 has 3 divisors (see below), whose sum is σ = 30198619507. Its totient is φ = 30198271952.

The previous prime is 30198445721. The next prime is 30198445789. The reversal of 30198445729 is 92754489103.

The square root of 30198445729 is 173777.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92754489103 = 79 ⋅1174107457.

It can be written as a sum of positive squares in only one way, i.e., 1823717025 + 28374728704 = 42705^2 + 168448^2 .

It is not a de Polignac number, because 30198445729 - 2³ = 30198445721 is a prime.

It is a super-2 number, since 2×30198445729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30198445721) 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, 86889 + ... + 260665.

Almost surely, 2^30198445729 is an apocalyptic number.

30198445729 is the 173777-th square number.

30198445729 is the 86889-th centered octagonal number.

It is an amenable number.

30198445729 is a deficient number, since it is larger than the sum of its proper divisors (173778).

30198445729 is an frugal number, since it uses more digits than its factorization.

30198445729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347554 (or 173777 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 30198445729 in words is "thirty billion, one hundred ninety-eight million, four hundred forty-five thousand, seven hundred twenty-nine".