133445669 has 24 divisors (see below), whose sum is σ = 163065600. Its totient is φ = 108743040.

The previous prime is 133445651. The next prime is 133445671. The reversal of 133445669 is 966544331.

It is not a de Polignac number, because 133445669 - 2⁸ = 133445413 is a prime.

It is a super-2 number, since 2×133445669² = 35615493149715122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133445969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88877 + ... + 90365.

It is an arithmetic number, because the mean of its divisors is an integer number (6794400).

Almost surely, 2^133445669 is an apocalyptic number.

It is an amenable number.

133445669 is a deficient number, since it is larger than the sum of its proper divisors (29619931).

133445669 is a wasteful number, since it uses less digits than its factorization.

133445669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1586 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 133445669 is about 11551.8686367185. The cubic root of 133445669 is about 511.0163877899.

The spelling of 133445669 in words is "one hundred thirty-three million, four hundred forty-five thousand, six hundred sixty-nine".