133645723 has 2 divisors, whose sum is σ = 133645724. Its totient is φ = 133645722.

The previous prime is 133645697. The next prime is 133645741. The reversal of 133645723 is 327546331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133645723 is a prime.

It is a super-2 number, since 2×133645723² = 35722358552385458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133645793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66822861 + 66822862.

It is an arithmetic number, because the mean of its divisors is an integer number (66822862).

Almost surely, 2^133645723 is an apocalyptic number.

133645723 is a deficient number, since it is larger than the sum of its proper divisors (1).

133645723 is an equidigital number, since it uses as much as digits as its factorization.

133645723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 34.

The square root of 133645723 is about 11560.5243393196. The cubic root of 133645723 is about 511.2716223223.

The spelling of 133645723 in words is "one hundred thirty-three million, six hundred forty-five thousand, seven hundred twenty-three".