30930961 has 2 divisors, whose sum is σ = 30930962. Its totient is φ = 30930960.

The previous prime is 30930953. The next prime is 30931009. The reversal of 30930961 is 16903903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 3682561 = 5220^2 + 1919^2 .

It is an emirp because it is prime and its reverse (16903903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30930961 - 2³ = 30930953 is a prime.

It is not a weakly prime, because it can be changed into another prime (30930061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15465480 + 15465481.

It is an arithmetic number, because the mean of its divisors is an integer number (15465481).

Almost surely, 2^30930961 is an apocalyptic number.

It is an amenable number.

30930961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30930961 is an equidigital number, since it uses as much as digits as its factorization.

30930961 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 31.

The square root of 30930961 is about 5561.5610218715. The cubic root of 30930961 is about 313.9046899933.

The spelling of 30930961 in words is "thirty million, nine hundred thirty thousand, nine hundred sixty-one".