30891847479 has 16 divisors (see below), whose sum is σ = 42531032064. Its totient is φ = 19924027200.

The previous prime is 30891847463. The next prime is 30891847487. The reversal of 30891847479 is 97474819803.

It is not a de Polignac number, because 30891847479 - 2⁴ = 30891847463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30891847499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259059 + ... + 359019.

It is an arithmetic number, because the mean of its divisors is an integer number (2658189504).

Almost surely, 2^30891847479 is an apocalyptic number.

30891847479 is a deficient number, since it is larger than the sum of its proper divisors (11639184585).

30891847479 is a wasteful number, since it uses less digits than its factorization.

30891847479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103318.

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 30891847479 in words is "thirty billion, eight hundred ninety-one million, eight hundred forty-seven thousand, four hundred seventy-nine".