133401423 has 4 divisors (see below), whose sum is σ = 177868568. Its totient is φ = 88934280.

The previous prime is 133401409. The next prime is 133401439. The reversal of 133401423 is 324104331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133401423 - 2¹⁴ = 133385039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133401423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133401473) 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, 22233568 + ... + 22233573.

It is an arithmetic number, because the mean of its divisors is an integer number (44467142).

Almost surely, 2^133401423 is an apocalyptic number.

133401423 is a deficient number, since it is larger than the sum of its proper divisors (44467145).

133401423 is an equidigital number, since it uses as much as digits as its factorization.

133401423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44467144.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133401423 is about 11549.9533765293. The cubic root of 133401423 is about 510.9599030531.

Adding to 133401423 its reverse (324104331), we get a palindrome (457505754).

The spelling of 133401423 in words is "one hundred thirty-three million, four hundred one thousand, four hundred twenty-three".