30290989 has 2 divisors, whose sum is σ = 30290990. Its totient is φ = 30290988.

The previous prime is 30290969. The next prime is 30291007. The reversal of 30290989 is 98909203.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15468489 + 14822500 = 3933^2 + 3850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30290989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30290969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15145494 + 15145495.

It is an arithmetic number, because the mean of its divisors is an integer number (15145495).

Almost surely, 2^30290989 is an apocalyptic number.

It is an amenable number.

30290989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30290989 is an equidigital number, since it uses as much as digits as its factorization.

30290989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 30290989 is about 5503.7250112992. The cubic root of 30290989 is about 311.7246536594.

The spelling of 30290989 in words is "thirty million, two hundred ninety thousand, nine hundred eighty-nine".