338185961 has 2 divisors, whose sum is σ = 338185962. Its totient is φ = 338185960.

The previous prime is 338185943. The next prime is 338185963. The reversal of 338185961 is 169581833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336942736 + 1243225 = 18356^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 338185961 - 2²² = 333991657 is a prime.

It is a super-2 number, since 2×338185961² = 228739488434987042, which contains 22 as substring.

Together with 338185963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (338185963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169092980 + 169092981.

It is an arithmetic number, because the mean of its divisors is an integer number (169092981).

Almost surely, 2^338185961 is an apocalyptic number.

It is an amenable number.

338185961 is a deficient number, since it is larger than the sum of its proper divisors (1).

338185961 is an equidigital number, since it uses as much as digits as its factorization.

338185961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 338185961 is about 18389.8330878777. The cubic root of 338185961 is about 696.7097019677.

The spelling of 338185961 in words is "three hundred thirty-eight million, one hundred eighty-five thousand, nine hundred sixty-one".