30009919 has 2 divisors, whose sum is σ = 30009920. Its totient is φ = 30009918.

The previous prime is 30009907. The next prime is 30009979. The reversal of 30009919 is 91990003.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30009919 - 2⁹ = 30009407 is a prime.

It is a super-2 number, since 2×30009919² = 1801190476773122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30009979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15004959 + 15004960.

It is an arithmetic number, because the mean of its divisors is an integer number (15004960).

Almost surely, 2^30009919 is an apocalyptic number.

30009919 is a deficient number, since it is larger than the sum of its proper divisors (1).

30009919 is an equidigital number, since it uses as much as digits as its factorization.

30009919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 30009919 is about 5478.1309768935. The cubic root of 30009919 is about 310.7574919766.

The spelling of 30009919 in words is "thirty million, nine thousand, nine hundred nineteen".