30249391 has 2 divisors, whose sum is σ = 30249392. Its totient is φ = 30249390.

The previous prime is 30249383. The next prime is 30249403. The reversal of 30249391 is 19394203.

It is a weak prime.

It is an emirp because it is prime and its reverse (19394203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30249391 - 2³ = 30249383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30249491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15124695 + 15124696.

It is an arithmetic number, because the mean of its divisors is an integer number (15124696).

Almost surely, 2^30249391 is an apocalyptic number.

30249391 is a deficient number, since it is larger than the sum of its proper divisors (1).

30249391 is an equidigital number, since it uses as much as digits as its factorization.

30249391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30249391 is about 5499.9446360850. The cubic root of 30249391 is about 311.5818932442.

The spelling of 30249391 in words is "thirty million, two hundred forty-nine thousand, three hundred ninety-one".