209045290123 has 2 divisors, whose sum is σ = 209045290124. Its totient is φ = 209045290122.

The previous prime is 209045290093. The next prime is 209045290147. The reversal of 209045290123 is 321092540902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209045290123 is a prime.

It is a super-3 number, since 3×209045290123³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (209045290193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104522645061 + 104522645062.

It is an arithmetic number, because the mean of its divisors is an integer number (104522645062).

Almost surely, 2^209045290123 is an apocalyptic number.

209045290123 is a deficient number, since it is larger than the sum of its proper divisors (1).

209045290123 is an equidigital number, since it uses as much as digits as its factorization.

209045290123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 209045290123 in words is "two hundred nine billion, forty-five million, two hundred ninety thousand, one hundred twenty-three".