208047306377 has 2 divisors, whose sum is σ = 208047306378. Its totient is φ = 208047306376.

The previous prime is 208047306241. The next prime is 208047306451. The reversal of 208047306377 is 773603740802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183311566201 + 24735740176 = 428149^2 + 157276^2 .

It is a cyclic number.

It is not a de Polignac number, because 208047306377 - 2³² = 203752339081 is a prime.

It is a super-2 number, since 2×208047306377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208047306877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104023653188 + 104023653189.

It is an arithmetic number, because the mean of its divisors is an integer number (104023653189).

Almost surely, 2^208047306377 is an apocalyptic number.

It is an amenable number.

208047306377 is a deficient number, since it is larger than the sum of its proper divisors (1).

208047306377 is an equidigital number, since it uses as much as digits as its factorization.

208047306377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 208047306377 in words is "two hundred eight billion, forty-seven million, three hundred six thousand, three hundred seventy-seven".