133820678243 has 4 divisors (see below), whose sum is σ = 152937918000. Its totient is φ = 114703438488.

The previous prime is 133820678209. The next prime is 133820678249. The reversal of 133820678243 is 342876028331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342876028331 = 16453 ⋅20839727.

It is a cyclic number.

It is not a de Polignac number, because 133820678243 - 2¹² = 133820674147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133820678249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9558619868 + ... + 9558619881.

It is an arithmetic number, because the mean of its divisors is an integer number (38234479500).

Almost surely, 2^133820678243 is an apocalyptic number.

133820678243 is a deficient number, since it is larger than the sum of its proper divisors (19117239757).

133820678243 is an equidigital number, since it uses as much as digits as its factorization.

133820678243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19117239756.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 133820678243 in words is "one hundred thirty-three billion, eight hundred twenty million, six hundred seventy-eight thousand, two hundred forty-three".