133953406 has 4 divisors (see below), whose sum is σ = 200930112. Its totient is φ = 66976702.

The previous prime is 133953361. The next prime is 133953409. The reversal of 133953406 is 604359331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604359331 = 23473 ⋅25747.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133953409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33488350 + ... + 33488353.

It is an arithmetic number, because the mean of its divisors is an integer number (50232528).

Almost surely, 2^133953406 is an apocalyptic number.

133953406 is a deficient number, since it is larger than the sum of its proper divisors (66976706).

133953406 is an equidigital number, since it uses as much as digits as its factorization.

133953406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66976705.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 133953406 is about 11573.8241735392. The cubic root of 133953406 is about 511.6636763198.

It can be divided in two parts, 1339 and 53406, that added together give a palindrome (54745).

The spelling of 133953406 in words is "one hundred thirty-three million, nine hundred fifty-three thousand, four hundred six".