30983121569 has 2 divisors, whose sum is σ = 30983121570. Its totient is φ = 30983121568.

The previous prime is 30983121551. The next prime is 30983121577. The reversal of 30983121569 is 96512138903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30914430625 + 68690944 = 175825^2 + 8288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30983121569 is a prime.

It is a super-2 number, since 2×30983121569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30983121599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15491560784 + 15491560785.

It is an arithmetic number, because the mean of its divisors is an integer number (15491560785).

Almost surely, 2^30983121569 is an apocalyptic number.

It is an amenable number.

30983121569 is a deficient number, since it is larger than the sum of its proper divisors (1).

30983121569 is an equidigital number, since it uses as much as digits as its factorization.

30983121569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 30983121569 in words is "thirty billion, nine hundred eighty-three million, one hundred twenty-one thousand, five hundred sixty-nine".