30887161 has 2 divisors, whose sum is σ = 30887162. Its totient is φ = 30887160.

The previous prime is 30887123. The next prime is 30887177. The reversal of 30887161 is 16178803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 6325225 = 4956^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 30887161 - 2¹⁹ = 30362873 is a prime.

It is not a weakly prime, because it can be changed into another prime (30887111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15443580 + 15443581.

It is an arithmetic number, because the mean of its divisors is an integer number (15443581).

Almost surely, 2^30887161 is an apocalyptic number.

It is an amenable number.

30887161 is a deficient number, since it is larger than the sum of its proper divisors (1).

30887161 is an equidigital number, since it uses as much as digits as its factorization.

30887161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 30887161 is about 5557.6218835038. The cubic root of 30887161 is about 313.7564510348.

The spelling of 30887161 in words is "thirty million, eight hundred eighty-seven thousand, one hundred sixty-one".