208608623 has 2 divisors, whose sum is σ = 208608624. Its totient is φ = 208608622.

The previous prime is 208608577. The next prime is 208608671. The reversal of 208608623 is 326806802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208608623 is a prime.

It is a super-2 number, since 2×208608623² = 87035115179912258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208608823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104304311 + 104304312.

It is an arithmetic number, because the mean of its divisors is an integer number (104304312).

Almost surely, 2^208608623 is an apocalyptic number.

208608623 is a deficient number, since it is larger than the sum of its proper divisors (1).

208608623 is an equidigital number, since it uses as much as digits as its factorization.

208608623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 208608623 is about 14443.2898953112. The cubic root of 208608623 is about 593.0765494143.

The spelling of 208608623 in words is "two hundred eight million, six hundred eight thousand, six hundred twenty-three".