30102091 has 2 divisors, whose sum is σ = 30102092. Its totient is φ = 30102090.

The previous prime is 30102089. The next prime is 30102131. The reversal of 30102091 is 19020103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30102091 - 2¹ = 30102089 is a prime.

It is a super-2 number, since 2×30102091² = 1812271765144562, which contains 22 as substring.

Together with 30102089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30102031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15051045 + 15051046.

It is an arithmetic number, because the mean of its divisors is an integer number (15051046).

Almost surely, 2^30102091 is an apocalyptic number.

30102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

30102091 is an equidigital number, since it uses as much as digits as its factorization.

30102091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 30102091 is about 5486.5372503976. The cubic root of 30102091 is about 311.0753187234.

Adding to 30102091 its reverse (19020103), we get a palindrome (49122194).

The spelling of 30102091 in words is "thirty million, one hundred two thousand, ninety-one".