30944861 has 2 divisors, whose sum is σ = 30944862. Its totient is φ = 30944860.

The previous prime is 30944831. The next prime is 30944887. The reversal of 30944861 is 16844903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 3171961 = 5270^2 + 1781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30944861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30944831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15472430 + 15472431.

It is an arithmetic number, because the mean of its divisors is an integer number (15472431).

Almost surely, 2^30944861 is an apocalyptic number.

It is an amenable number.

30944861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30944861 is an equidigital number, since it uses as much as digits as its factorization.

30944861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 30944861 is about 5562.8105306580. The cubic root of 30944861 is about 313.9517046092.

The spelling of 30944861 in words is "thirty million, nine hundred forty-four thousand, eight hundred sixty-one".