133823849 has 2 divisors, whose sum is σ = 133823850. Its totient is φ = 133823848.

The previous prime is 133823839. The next prime is 133823863. The reversal of 133823849 is 948328331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122500624 + 11323225 = 11068^2 + 3365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133823849 is a prime.

It is a super-2 number, since 2×133823849² = 35817645122349602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133823839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66911924 + 66911925.

It is an arithmetic number, because the mean of its divisors is an integer number (66911925).

Almost surely, 2^133823849 is an apocalyptic number.

It is an amenable number.

133823849 is a deficient number, since it is larger than the sum of its proper divisors (1).

133823849 is an equidigital number, since it uses as much as digits as its factorization.

133823849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 133823849 is about 11568.2258363156. The cubic root of 133823849 is about 511.4986662224.

The spelling of 133823849 in words is "one hundred thirty-three million, eight hundred twenty-three thousand, eight hundred forty-nine".