193561985 has 16 divisors (see below), whose sum is σ = 246254592. Its totient is φ = 145800000.

The previous prime is 193561969. The next prime is 193562023. The reversal of 193561985 is 589165391.

It is not a de Polignac number, because 193561985 - 2⁴ = 193561969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11141 + ... + 22610.

It is an arithmetic number, because the mean of its divisors is an integer number (15390912).

Almost surely, 2^193561985 is an apocalyptic number.

It is an amenable number.

193561985 is a deficient number, since it is larger than the sum of its proper divisors (52692607).

193561985 is a wasteful number, since it uses less digits than its factorization.

193561985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33824.

The product of its digits is 291600, while the sum is 47.

The square root of 193561985 is about 13912.6555696603. The cubic root of 193561985 is about 578.4600299530.

The spelling of 193561985 in words is "one hundred ninety-three million, five hundred sixty-one thousand, nine hundred eighty-five".