30944989 has 2 divisors, whose sum is σ = 30944990. Its totient is φ = 30944988.

The previous prime is 30944923. The next prime is 30945007. The reversal of 30944989 is 98944903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 15405625 = 3942^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 30944989 - 2⁷ = 30944861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30944909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15472494 + 15472495.

It is an arithmetic number, because the mean of its divisors is an integer number (15472495).

Almost surely, 2^30944989 is an apocalyptic number.

It is an amenable number.

30944989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30944989 is an equidigital number, since it uses as much as digits as its factorization.

30944989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 30944989 is about 5562.8220356218. The cubic root of 30944989 is about 313.9521374841.

The spelling of 30944989 in words is "thirty million, nine hundred forty-four thousand, nine hundred eighty-nine".