338991001 has 4 divisors (see below), whose sum is σ = 340446132. Its totient is φ = 337535872.

The previous prime is 338990963. The next prime is 338991013. The reversal of 338991001 is 100199833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100199833 = 167 ⋅599999.

It can be written as a sum of positive squares in 2 ways, for example, as 97219600 + 241771401 = 9860^2 + 15549^2 .

It is a cyclic number.

It is not a de Polignac number, because 338991001 - 2¹¹ = 338988953 is a prime.

It is a super-2 number, since 2×338991001² = 229829797517964002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338991071) 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, 727216 + ... + 727681.

It is an arithmetic number, because the mean of its divisors is an integer number (85111533).

Almost surely, 2^338991001 is an apocalyptic number.

It is an amenable number.

338991001 is a deficient number, since it is larger than the sum of its proper divisors (1455131).

338991001 is a wasteful number, since it uses less digits than its factorization.

338991001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455130.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 338991001 is about 18411.7082586054. The cubic root of 338991001 is about 697.2620950094.

The spelling of 338991001 in words is "three hundred thirty-eight million, nine hundred ninety-one thousand, one".