30905107 has 2 divisors, whose sum is σ = 30905108. Its totient is φ = 30905106.

The previous prime is 30905087. The next prime is 30905113. The reversal of 30905107 is 70150903.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30905107 is a prime.

It is not a weakly prime, because it can be changed into another prime (30905177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15452553 + 15452554.

It is an arithmetic number, because the mean of its divisors is an integer number (15452554).

Almost surely, 2^30905107 is an apocalyptic number.

30905107 is a deficient number, since it is larger than the sum of its proper divisors (1).

30905107 is an equidigital number, since it uses as much as digits as its factorization.

30905107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 30905107 is about 5559.2361885425. The cubic root of 30905107 is about 313.8172053302.

The spelling of 30905107 in words is "thirty million, nine hundred five thousand, one hundred seven".