30948927891839 has 4 divisors (see below), whose sum is σ = 31267989004224. Its totient is φ = 30629866779456.

The previous prime is 30948927891823. The next prime is 30948927891881. The reversal of 30948927891839 is 93819872984903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30948927891839 - 2⁴ = 30948927891823 is a prime.

It is a super-2 number, since 2×30948927891839² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30948927899839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159530556047 + ... + 159530556240.

It is an arithmetic number, because the mean of its divisors is an integer number (7816997251056).

Almost surely, 2^{30948927891839} is an apocalyptic number.

30948927891839 is a deficient number, since it is larger than the sum of its proper divisors (319061112385).

30948927891839 is an equidigital number, since it uses as much as digits as its factorization.

30948927891839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319061112384.

The product of its (nonzero) digits is 1693052928, while the sum is 80.

The spelling of 30948927891839 in words is "thirty trillion, nine hundred forty-eight billion, nine hundred twenty-seven million, eight hundred ninety-one thousand, eight hundred thirty-nine".