30897866681 has 8 divisors (see below), whose sum is σ = 33767285184. Its totient is φ = 28038535120.

The previous prime is 30897866669. The next prime is 30897866689. The reversal of 30897866681 is 18666879803.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30897866681 - 2¹⁴ = 30897850297 is a prime.

It is a super-2 number, since 2×30897866681² (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 (30897866689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2515325 + ... + 2527578.

It is an arithmetic number, because the mean of its divisors is an integer number (4220910648).

Almost surely, 2^30897866681 is an apocalyptic number.

It is an amenable number.

30897866681 is a deficient number, since it is larger than the sum of its proper divisors (2869418503).

30897866681 is a wasteful number, since it uses less digits than its factorization.

30897866681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043471.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 30897866681 in words is "thirty billion, eight hundred ninety-seven million, eight hundred sixty-six thousand, six hundred eighty-one".