30869989 has 2 divisors, whose sum is σ = 30869990. Its totient is φ = 30869988.

The previous prime is 30869983. The next prime is 30870013. The reversal of 30869989 is 98996803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 10349089 = 4530^2 + 3217^2 .

It is an emirp because it is prime and its reverse (98996803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30869989 - 2³ = 30869981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30869981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15434994 + 15434995.

It is an arithmetic number, because the mean of its divisors is an integer number (15434995).

Almost surely, 2^30869989 is an apocalyptic number.

It is an amenable number.

30869989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30869989 is an equidigital number, since it uses as much as digits as its factorization.

30869989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 30869989 is about 5556.0767633286. The cubic root of 30869989 is about 313.6982949986.

The spelling of 30869989 in words is "thirty million, eight hundred sixty-nine thousand, nine hundred eighty-nine".