200409356997 has 6 divisors (see below), whose sum is σ = 289480182342. Its totient is φ = 133606237992.

The previous prime is 200409356989. The next prime is 200409357013. The reversal of 200409356997 is 799653904002.

It can be written as a sum of positive squares in only one way, i.e., 191534021316 + 8875335681 = 437646^2 + 94209^2 .

It is not a de Polignac number, because 200409356997 - 2³ = 200409356989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200409356297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11133853158 + ... + 11133853175.

It is an arithmetic number, because the mean of its divisors is an integer number (48246697057).

Almost surely, 2^200409356997 is an apocalyptic number.

It is an amenable number.

200409356997 is a deficient number, since it is larger than the sum of its proper divisors (89070825345).

200409356997 is a wasteful number, since it uses less digits than its factorization.

200409356997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22267706339 (or 22267706336 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 200409356997 in words is "two hundred billion, four hundred nine million, three hundred fifty-six thousand, nine hundred ninety-seven".