338758649 has 2 divisors, whose sum is σ = 338758650. Its totient is φ = 338758648.

The previous prime is 338758627. The next prime is 338758699. The reversal of 338758649 is 946857833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241243024 + 97515625 = 15532^2 + 9875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338758649 is a prime.

It is a super-2 number, since 2×338758649² = 229514844544610402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 338758649.

It is not a weakly prime, because it can be changed into another prime (338758699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169379324 + 169379325.

It is an arithmetic number, because the mean of its divisors is an integer number (169379325).

Almost surely, 2^338758649 is an apocalyptic number.

It is an amenable number.

338758649 is a deficient number, since it is larger than the sum of its proper divisors (1).

338758649 is an equidigital number, since it uses as much as digits as its factorization.

338758649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The square root of 338758649 is about 18405.3972790592. The cubic root of 338758649 is about 697.1027522628.

It can be divided in two parts, 33875 and 8649, that added together give a palindrome (42524).

The spelling of 338758649 in words is "three hundred thirty-eight million, seven hundred fifty-eight thousand, six hundred forty-nine".