133669451 has 4 divisors (see below), whose sum is σ = 134048472. Its totient is φ = 133290432.

The previous prime is 133669447. The next prime is 133669463. The reversal of 133669451 is 154966331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154966331 = 13 ⋅11920487.

It is a cyclic number.

It is not a de Polignac number, because 133669451 - 2² = 133669447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133669411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188981 + ... + 189686.

It is an arithmetic number, because the mean of its divisors is an integer number (33512118).

Almost surely, 2^133669451 is an apocalyptic number.

133669451 is a deficient number, since it is larger than the sum of its proper divisors (379021).

133669451 is an equidigital number, since it uses as much as digits as its factorization.

133669451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379020.

The product of its digits is 58320, while the sum is 38.

The square root of 133669451 is about 11561.5505448015. The cubic root of 133669451 is about 511.3018782728.

The spelling of 133669451 in words is "one hundred thirty-three million, six hundred sixty-nine thousand, four hundred fifty-one".