135578973 has 32 divisors (see below), whose sum is σ = 194088960. Its totient is φ = 84029120.

The previous prime is 135578953. The next prime is 135578987. The reversal of 135578973 is 379875531.

It is a cyclic number.

It is not a de Polignac number, because 135578973 - 2⁵ = 135578941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135578953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290086 + ... + 290552.

It is an arithmetic number, because the mean of its divisors is an integer number (6065280).

Almost surely, 2^135578973 is an apocalyptic number.

It is an amenable number.

135578973 is a deficient number, since it is larger than the sum of its proper divisors (58509987).

135578973 is a wasteful number, since it uses less digits than its factorization.

135578973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 793800, while the sum is 48.

The square root of 135578973 is about 11643.8384135130. The cubic root of 135578973 is about 513.7250936002.

The spelling of 135578973 in words is "one hundred thirty-five million, five hundred seventy-eight thousand, nine hundred seventy-three".