133920569 has 4 divisors (see below), whose sum is σ = 140969040. Its totient is φ = 126872100.

The previous prime is 133920557. The next prime is 133920587. The reversal of 133920569 is 965029331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133920569 - 2⁸ = 133920313 is a prime.

It is a super-2 number, since 2×133920569² = 35869437602567522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133920539) 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, 3524207 + ... + 3524244.

It is an arithmetic number, because the mean of its divisors is an integer number (35242260).

Almost surely, 2^133920569 is an apocalyptic number.

133920569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

133920569 is a deficient number, since it is larger than the sum of its proper divisors (7048471).

133920569 is an equidigital number, since it uses as much as digits as its factorization.

133920569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048470.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 133920569 is about 11572.4054975619. The cubic root of 133920569 is about 511.6218635887.

The spelling of 133920569 in words is "one hundred thirty-three million, nine hundred twenty thousand, five hundred sixty-nine".