135569973 has 24 divisors (see below), whose sum is σ = 227074624. Its totient is φ = 70424640.

The previous prime is 135569953. The next prime is 135570007. The reversal of 135569973 is 379965531.

It is not a de Polignac number, because 135569973 - 2⁶ = 135569909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135569923) 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, 24136 + ... + 29217.

Almost surely, 2^135569973 is an apocalyptic number.

It is an amenable number.

135569973 is a deficient number, since it is larger than the sum of its proper divisors (91504651).

135569973 is a wasteful number, since it uses less digits than its factorization.

135569973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53385 (or 53374 counting only the distinct ones).

The product of its digits is 765450, while the sum is 48.

The square root of 135569973 is about 11643.4519366037. The cubic root of 135569973 is about 513.7137259865.

The spelling of 135569973 in words is "one hundred thirty-five million, five hundred sixty-nine thousand, nine hundred seventy-three".