133620023 has 4 divisors (see below), whose sum is σ = 138227640. Its totient is φ = 129012408.

The previous prime is 133620001. The next prime is 133620059. The reversal of 133620023 is 320026331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320026331 = 829 ⋅386039.

It is a cyclic number.

It is not a de Polignac number, because 133620023 - 2⁸ = 133619767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133619977 and 133620004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133620523) 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, 2303765 + ... + 2303822.

It is an arithmetic number, because the mean of its divisors is an integer number (34556910).

Almost surely, 2^133620023 is an apocalyptic number.

133620023 is a deficient number, since it is larger than the sum of its proper divisors (4607617).

133620023 is an equidigital number, since it uses as much as digits as its factorization.

133620023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607616.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 133620023 is about 11559.4127445991. The cubic root of 133620023 is about 511.2388478028.

Adding to 133620023 its reverse (320026331), we get a palindrome (453646354).

The spelling of 133620023 in words is "one hundred thirty-three million, six hundred twenty thousand, twenty-three".