133923945 has 8 divisors (see below), whose sum is σ = 214278336. Its totient is φ = 71426096.

The previous prime is 133923931. The next prime is 133923953. The reversal of 133923945 is 549329331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133923945 - 2⁴ = 133923929 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4464117 + ... + 4464146.

It is an arithmetic number, because the mean of its divisors is an integer number (26784792).

Almost surely, 2^133923945 is an apocalyptic number.

133923945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133923945 is a deficient number, since it is larger than the sum of its proper divisors (80354391).

133923945 is an equidigital number, since it uses as much as digits as its factorization.

133923945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928271.

The product of its digits is 87480, while the sum is 39.

The square root of 133923945 is about 11572.5513608711. The cubic root of 133923945 is about 511.6261627065.

The spelling of 133923945 in words is "one hundred thirty-three million, nine hundred twenty-three thousand, nine hundred forty-five".