17982961 has 2 divisors, whose sum is σ = 17982962. Its totient is φ = 17982960.

The previous prime is 17982931. The next prime is 17982971. The reversal of 17982961 is 16928971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15358561 + 2624400 = 3919^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 17982961 - 2²³ = 9594353 is a prime.

It is not a weakly prime, because it can be changed into another prime (17982931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8991480 + 8991481.

It is an arithmetic number, because the mean of its divisors is an integer number (8991481).

Almost surely, 2^17982961 is an apocalyptic number.

It is an amenable number.

17982961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17982961 is an equidigital number, since it uses as much as digits as its factorization.

17982961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 17982961 is about 4240.6321462725. The cubic root of 17982961 is about 261.9914192167.

The spelling of 17982961 in words is "seventeen million, nine hundred eighty-two thousand, nine hundred sixty-one".