133685803 has 2 divisors, whose sum is σ = 133685804. Its totient is φ = 133685802.

The previous prime is 133685801. The next prime is 133685861. The reversal of 133685803 is 308586331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133685803 - 2¹ = 133685801 is a prime.

Together with 133685801, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133685801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66842901 + 66842902.

It is an arithmetic number, because the mean of its divisors is an integer number (66842902).

Almost surely, 2^133685803 is an apocalyptic number.

133685803 is a deficient number, since it is larger than the sum of its proper divisors (1).

133685803 is an equidigital number, since it uses as much as digits as its factorization.

133685803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 133685803 is about 11562.2576947584. The cubic root of 133685803 is about 511.3227268845.

The spelling of 133685803 in words is "one hundred thirty-three million, six hundred eighty-five thousand, eight hundred three".