30630961 has 2 divisors, whose sum is σ = 30630962. Its totient is φ = 30630960.

The previous prime is 30630959. The next prime is 30631001. The reversal of 30630961 is 16903603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29322225 + 1308736 = 5415^2 + 1144^2 .

It is a cyclic number.

It is not a de Polignac number, because 30630961 - 2¹ = 30630959 is a prime.

Together with 30630959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30630911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15315480 + 15315481.

It is an arithmetic number, because the mean of its divisors is an integer number (15315481).

Almost surely, 2^30630961 is an apocalyptic number.

It is an amenable number.

30630961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30630961 is an equidigital number, since it uses as much as digits as its factorization.

30630961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 30630961 is about 5534.5244601501. The cubic root of 30630961 is about 312.8865352392.

The spelling of 30630961 in words is "thirty million, six hundred thirty thousand, nine hundred sixty-one".