194233887 has 6 divisors (see below), whose sum is σ = 280560072. Its totient is φ = 129489252.

The previous prime is 194233883. The next prime is 194233901. The reversal of 194233887 is 788332491.

It is not a de Polignac number, because 194233887 - 2² = 194233883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194233883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10790763 + ... + 10790780.

It is an arithmetic number, because the mean of its divisors is an integer number (46760012).

Almost surely, 2^194233887 is an apocalyptic number.

194233887 is a deficient number, since it is larger than the sum of its proper divisors (86326185).

194233887 is a wasteful number, since it uses less digits than its factorization.

194233887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21581549 (or 21581546 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 194233887 is about 13936.7818021235. The cubic root of 194233887 is about 579.1285833961.

The spelling of 194233887 in words is "one hundred ninety-four million, two hundred thirty-three thousand, eight hundred eighty-seven".