30689513989 has 2 divisors, whose sum is σ = 30689513990. Its totient is φ = 30689513988.

The previous prime is 30689513941. The next prime is 30689514029. The reversal of 30689513989 is 98931598603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17043302500 + 13646211489 = 130550^2 + 116817^2 .

It is a cyclic number.

It is not a de Polignac number, because 30689513989 - 2¹⁷ = 30689382917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30689513189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15344756994 + 15344756995.

It is an arithmetic number, because the mean of its divisors is an integer number (15344756995).

Almost surely, 2^30689513989 is an apocalyptic number.

It is an amenable number.

30689513989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30689513989 is an equidigital number, since it uses as much as digits as its factorization.

30689513989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 30689513989 in words is "thirty billion, six hundred eighty-nine million, five hundred thirteen thousand, nine hundred eighty-nine".