17860961 has 2 divisors, whose sum is σ = 17860962. Its totient is φ = 17860960.

The previous prime is 17860957. The next prime is 17860963. The reversal of 17860961 is 16906871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 430336 = 4175^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 17860961 - 2² = 17860957 is a prime.

It is a Sophie Germain prime.

Together with 17860963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (17860963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8930480 + 8930481.

It is an arithmetic number, because the mean of its divisors is an integer number (8930481).

Almost surely, 2^17860961 is an apocalyptic number.

It is an amenable number.

17860961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17860961 is an equidigital number, since it uses as much as digits as its factorization.

17860961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 17860961 is about 4226.2230182516. The cubic root of 17860961 is about 261.3976069624.

The spelling of 17860961 in words is "seventeen million, eight hundred sixty thousand, nine hundred sixty-one".