209672256306133 has 2 divisors, whose sum is σ = 209672256306134. Its totient is φ = 209672256306132.

The previous prime is 209672256306127. The next prime is 209672256306179. The reversal of 209672256306133 is 331603652276902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136948576465009 + 72723679841124 = 11702503^2 + 8527818^2 .

It is a cyclic number.

It is not a de Polignac number, because 209672256306133 - 2³³ = 209663666371541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209672256306433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104836128153066 + 104836128153067.

It is an arithmetic number, because the mean of its divisors is an integer number (104836128153067).

Almost surely, 2^{209672256306133} is an apocalyptic number.

It is an amenable number.

209672256306133 is a deficient number, since it is larger than the sum of its proper divisors (1).

209672256306133 is an equidigital number, since it uses as much as digits as its factorization.

209672256306133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 55.

The spelling of 209672256306133 in words is "two hundred nine trillion, six hundred seventy-two billion, two hundred fifty-six million, three hundred six thousand, one hundred thirty-three".