135820974 has 8 divisors (see below), whose sum is σ = 271641960. Its totient is φ = 45273656.

The previous prime is 135820963. The next prime is 135820981. The reversal of 135820974 is 479028531.

It is a sphenic number, since it is the product of 3 distinct primes.

135820974 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11318409 + ... + 11318420.

It is an arithmetic number, because the mean of its divisors is an integer number (33955245).

Almost surely, 2^135820974 is an apocalyptic number.

135820974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135820974 is a wasteful number, since it uses less digits than its factorization.

135820974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22636834.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 135820974 is about 11654.2255855977. The cubic root of 135820974 is about 514.0305689198.

The spelling of 135820974 in words is "one hundred thirty-five million, eight hundred twenty thousand, nine hundred seventy-four".