30490586981 has 2 divisors, whose sum is σ = 30490586982. Its totient is φ = 30490586980.

The previous prime is 30490586969. The next prime is 30490586993. The reversal of 30490586981 is 18968509403.

It is a balanced prime because it is at equal distance from previous prime (30490586969) and next prime (30490586993).

It can be written as a sum of positive squares in only one way, i.e., 30488652100 + 1934881 = 174610^2 + 1391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30490586981 is a prime.

It is a super-2 number, since 2×30490586981² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30490586911) 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 as a sum of consecutive naturals, namely, 15245293490 + 15245293491.

It is an arithmetic number, because the mean of its divisors is an integer number (15245293491).

Almost surely, 2^30490586981 is an apocalyptic number.

It is an amenable number.

30490586981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30490586981 is an equidigital number, since it uses as much as digits as its factorization.

30490586981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 30490586981 in words is "thirty billion, four hundred ninety million, five hundred eighty-six thousand, nine hundred eighty-one".