30858547172209 has 3 divisors (see below), whose sum is σ = 30858552727257. Its totient is φ = 30858541617162.

The previous prime is 30858547172177. The next prime is 30858547172239. The reversal of 30858547172209 is 90227174585803.

It is a happy number.

The square root of 30858547172209 is 5555047.

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 is not a de Polignac number, because 30858547172209 - 2⁵ = 30858547172177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30858547172239) 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, 2777524 + ... + 8332570.

It is an arithmetic number, because the mean of its divisors is an integer number (10286184242419).

Almost surely, 2^{30858547172209} is an apocalyptic number.

30858547172209 is the 5555047-th square number.

30858547172209 is the 2777524-th centered octagonal number.

It is an amenable number.

30858547172209 is a deficient number, since it is larger than the sum of its proper divisors (5555048).

30858547172209 is an frugal number, since it uses more digits than its factorization.

30858547172209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110094 (or 5555047 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 30858547172209 in words is "thirty trillion, eight hundred fifty-eight billion, five hundred forty-seven million, one hundred seventy-two thousand, two hundred nine".