30307630981 has 2 divisors, whose sum is σ = 30307630982. Its totient is φ = 30307630980.

The previous prime is 30307630979. The next prime is 30307631009. The reversal of 30307630981 is 18903670303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16220314881 + 14087316100 = 127359^2 + 118690^2 .

It is a cyclic number.

It is not a de Polignac number, because 30307630981 - 2¹ = 30307630979 is a prime.

It is a super-2 number, since 2×30307630981² (a number of 22 digits) contains 22 as substring.

Together with 30307630979, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30307633981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15153815490 + 15153815491.

It is an arithmetic number, because the mean of its divisors is an integer number (15153815491).

Almost surely, 2^30307630981 is an apocalyptic number.

It is an amenable number.

30307630981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30307630981 is an equidigital number, since it uses as much as digits as its factorization.

30307630981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 30307630981 in words is "thirty billion, three hundred seven million, six hundred thirty thousand, nine hundred eighty-one".