30661957 has 2 divisors, whose sum is σ = 30661958. Its totient is φ = 30661956.

The previous prime is 30661927. The next prime is 30661963. The reversal of 30661957 is 75916603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22743361 + 7918596 = 4769^2 + 2814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30661957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30661927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15330978 + 15330979.

It is an arithmetic number, because the mean of its divisors is an integer number (15330979).

Almost surely, 2^30661957 is an apocalyptic number.

It is an amenable number.

30661957 is a deficient number, since it is larger than the sum of its proper divisors (1).

30661957 is an equidigital number, since it uses as much as digits as its factorization.

30661957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 30661957 is about 5537.3239926882. The cubic root of 30661957 is about 312.9920380953.

The spelling of 30661957 in words is "thirty million, six hundred sixty-one thousand, nine hundred fifty-seven".