208046381458969 has 3 divisors (see below), whose sum is σ = 208046395882783. Its totient is φ = 208046367035156.

The previous prime is 208046381458967. The next prime is 208046381458991. The reversal of 208046381458969 is 969854183640802.

The square root of 208046381458969 is 14423813.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 39529323945225 + 168517057513744 = 6287235^2 + 12981412^2 .

It is not a de Polignac number, because 208046381458969 - 2¹ = 208046381458967 is a prime.

It is a super-2 number, since 2×208046381458969² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208046381458967) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7211907 + ... + 21635719.

Almost surely, 2^{208046381458969} is an apocalyptic number.

208046381458969 is the 14423813-rd square number.

208046381458969 is the 7211907-th centered octagonal number.

It is an amenable number.

208046381458969 is a deficient number, since it is larger than the sum of its proper divisors (14423814).

208046381458969 is an frugal number, since it uses more digits than its factorization.

208046381458969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28847626 (or 14423813 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 73.

The spelling of 208046381458969 in words is "two hundred eight trillion, forty-six billion, three hundred eighty-one million, four hundred fifty-eight thousand, nine hundred sixty-nine".