30990233 has 2 divisors, whose sum is σ = 30990234. Its totient is φ = 30990232.

The previous prime is 30990227. The next prime is 30990259. The reversal of 30990233 is 33209903.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30946969 + 43264 = 5563^2 + 208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30990233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30990196 and 30990205.

It is not a weakly prime, because it can be changed into another prime (30990263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15495116 + 15495117.

It is an arithmetic number, because the mean of its divisors is an integer number (15495117).

Almost surely, 2^30990233 is an apocalyptic number.

It is an amenable number.

30990233 is a deficient number, since it is larger than the sum of its proper divisors (1).

30990233 is an equidigital number, since it uses as much as digits as its factorization.

30990233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 30990233 is about 5566.8871912407. The cubic root of 30990233 is about 314.1050705212.

The spelling of 30990233 in words is "thirty million, nine hundred ninety thousand, two hundred thirty-three".