338820961 has 4 divisors (see below), whose sum is σ = 338988052. Its totient is φ = 338653872.

The previous prime is 338820947. The next prime is 338820971. The reversal of 338820961 is 169028833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169028833 = 31 ⋅5452543.

It can be written as a sum of positive squares in 2 ways, for example, as 220968225 + 117852736 = 14865^2 + 10856^2 .

It is a cyclic number.

It is not a de Polignac number, because 338820961 - 2⁵ = 338820929 is a prime.

It is a super-2 number, since 2×338820961² = 229599287225927042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338820971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80466 + ... + 84571.

It is an arithmetic number, because the mean of its divisors is an integer number (84747013).

Almost surely, 2^338820961 is an apocalyptic number.

It is an amenable number.

338820961 is a deficient number, since it is larger than the sum of its proper divisors (167091).

338820961 is a wasteful number, since it uses less digits than its factorization.

338820961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167090.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 338820961 is about 18407.0899655540. The cubic root of 338820961 is about 697.1454918393.

The spelling of 338820961 in words is "three hundred thirty-eight million, eight hundred twenty thousand, nine hundred sixty-one".