30990019 has 2 divisors, whose sum is σ = 30990020. Its totient is φ = 30990018.

The previous prime is 30989989. The next prime is 30990077. The reversal of 30990019 is 91009903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30990019 - 2¹³ = 30981827 is a prime.

It is a super-2 number, since 2×30990019² = 1920762555240722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30990119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15495009 + 15495010.

It is an arithmetic number, because the mean of its divisors is an integer number (15495010).

Almost surely, 2^30990019 is an apocalyptic number.

30990019 is a deficient number, since it is larger than the sum of its proper divisors (1).

30990019 is an equidigital number, since it uses as much as digits as its factorization.

30990019 is an odious number, because the sum of its binary digits is odd.

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

The square root of 30990019 is about 5566.8679704121. The cubic root of 30990019 is about 314.1043475124.

The spelling of 30990019 in words is "thirty million, nine hundred ninety thousand, nineteen".