30989213873 has 2 divisors, whose sum is σ = 30989213874. Its totient is φ = 30989213872.

The previous prime is 30989213869. The next prime is 30989213881. The reversal of 30989213873 is 37831298903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19105597729 + 11883616144 = 138223^2 + 109012^2 .

It is an emirp because it is prime and its reverse (37831298903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30989213873 - 2² = 30989213869 is a prime.

It is a super-4 number, since 4×30989213873⁴ (a number of 43 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (30989213833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15494606936 + 15494606937.

It is an arithmetic number, because the mean of its divisors is an integer number (15494606937).

Almost surely, 2^30989213873 is an apocalyptic number.

It is an amenable number.

30989213873 is a deficient number, since it is larger than the sum of its proper divisors (1).

30989213873 is an equidigital number, since it uses as much as digits as its factorization.

30989213873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 30989213873 in words is "thirty billion, nine hundred eighty-nine million, two hundred thirteen thousand, eight hundred seventy-three".