338687669 has 2 divisors, whose sum is σ = 338687670. Its totient is φ = 338687668.

The previous prime is 338687659. The next prime is 338687681. The reversal of 338687669 is 966786833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292854769 + 45832900 = 17113^2 + 6770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338687669 is a prime.

It is a super-2 number, since 2×338687669² = 229418674265307122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338687639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169343834 + 169343835.

It is an arithmetic number, because the mean of its divisors is an integer number (169343835).

Almost surely, 2^338687669 is an apocalyptic number.

It is an amenable number.

338687669 is a deficient number, since it is larger than the sum of its proper divisors (1).

338687669 is an equidigital number, since it uses as much as digits as its factorization.

338687669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The square root of 338687669 is about 18403.4689393060. The cubic root of 338687669 is about 697.0540609504.

The spelling of 338687669 in words is "three hundred thirty-eight million, six hundred eighty-seven thousand, six hundred sixty-nine".