209454335941 has 2 divisors, whose sum is σ = 209454335942. Its totient is φ = 209454335940.

The previous prime is 209454335873. The next prime is 209454336061. The reversal of 209454335941 is 149533454902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146191522500 + 63262813441 = 382350^2 + 251521^2 .

It is a cyclic number.

It is not a de Polignac number, because 209454335941 - 2⁷ = 209454335813 is a prime.

It is a super-2 number, since 2×209454335941² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209454330941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104727167970 + 104727167971.

It is an arithmetic number, because the mean of its divisors is an integer number (104727167971).

Almost surely, 2^209454335941 is an apocalyptic number.

It is an amenable number.

209454335941 is a deficient number, since it is larger than the sum of its proper divisors (1).

209454335941 is an equidigital number, since it uses as much as digits as its factorization.

209454335941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 209454335941 in words is "two hundred nine billion, four hundred fifty-four million, three hundred thirty-five thousand, nine hundred forty-one".