30530681989 has 2 divisors, whose sum is σ = 30530681990. Its totient is φ = 30530681988.

The previous prime is 30530681927. The next prime is 30530682029. The reversal of 30530681989 is 98918603503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15415208964 + 15115473025 = 124158^2 + 122945^2 .

It is an emirp because it is prime and its reverse (98918603503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30530681989 - 2⁹ = 30530681477 is a prime.

It is a super-2 number, since 2×30530681989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30530681789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15265340994 + 15265340995.

It is an arithmetic number, because the mean of its divisors is an integer number (15265340995).

Almost surely, 2^30530681989 is an apocalyptic number.

It is an amenable number.

30530681989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30530681989 is an equidigital number, since it uses as much as digits as its factorization.

30530681989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 30530681989 in words is "thirty billion, five hundred thirty million, six hundred eighty-one thousand, nine hundred eighty-nine".