208140923 has 2 divisors, whose sum is σ = 208140924. Its totient is φ = 208140922.

The previous prime is 208140893. The next prime is 208140937. The reversal of 208140923 is 329041802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208140923 - 2²² = 203946619 is a prime.

It is not a weakly prime, because it can be changed into another prime (208140983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104070461 + 104070462.

It is an arithmetic number, because the mean of its divisors is an integer number (104070462).

Almost surely, 2^208140923 is an apocalyptic number.

208140923 is a deficient number, since it is larger than the sum of its proper divisors (1).

208140923 is an equidigital number, since it uses as much as digits as its factorization.

208140923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 208140923 is about 14427.0899006002. The cubic root of 208140923 is about 592.6329923947.

The spelling of 208140923 in words is "two hundred eight million, one hundred forty thousand, nine hundred twenty-three".