30684961 has 2 divisors, whose sum is σ = 30684962. Its totient is φ = 30684960.

The previous prime is 30684959. The next prime is 30685003. The reversal of 30684961 is 16948603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 4100625 = 5156^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 30684961 - 2¹ = 30684959 is a prime.

Together with 30684959, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30684961.

It is not a weakly prime, because it can be changed into another prime (30684061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15342480 + 15342481.

It is an arithmetic number, because the mean of its divisors is an integer number (15342481).

Almost surely, 2^30684961 is an apocalyptic number.

It is an amenable number.

30684961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30684961 is an equidigital number, since it uses as much as digits as its factorization.

30684961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 30684961 is about 5539.4007798678. The cubic root of 30684961 is about 313.0702921675.

The spelling of 30684961 in words is "thirty million, six hundred eighty-four thousand, nine hundred sixty-one".