133601923 has 16 divisors (see below), whose sum is σ = 167541696. Its totient is φ = 103708800.

The previous prime is 133601911. The next prime is 133601933. The reversal of 133601923 is 329106331.

It is not a de Polignac number, because 133601923 - 2¹⁷ = 133470851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133601891 and 133601900.

It is not an unprimeable number, because it can be changed into a prime (133601933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9028 + ... + 18673.

It is an arithmetic number, because the mean of its divisors is an integer number (10471356).

Almost surely, 2^133601923 is an apocalyptic number.

133601923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133601923 is a deficient number, since it is larger than the sum of its proper divisors (33939773).

133601923 is a wasteful number, since it uses less digits than its factorization.

133601923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27774.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 133601923 is about 11558.6298063395. The cubic root of 133601923 is about 511.2157628370.

The spelling of 133601923 in words is "one hundred thirty-three million, six hundred one thousand, nine hundred twenty-three".