30918449 has 2 divisors, whose sum is σ = 30918450. Its totient is φ = 30918448.

The previous prime is 30918443. The next prime is 30918457. The reversal of 30918449 is 94481903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30724849 + 193600 = 5543^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 30918449 - 2¹² = 30914353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30918443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15459224 + 15459225.

It is an arithmetic number, because the mean of its divisors is an integer number (15459225).

Almost surely, 2^30918449 is an apocalyptic number.

It is an amenable number.

30918449 is a deficient number, since it is larger than the sum of its proper divisors (1).

30918449 is an equidigital number, since it uses as much as digits as its factorization.

30918449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 30918449 is about 5560.4360440527. The cubic root of 30918449 is about 313.8623580271.

The spelling of 30918449 in words is "thirty million, nine hundred eighteen thousand, four hundred forty-nine".