194797864 has 8 divisors (see below), whose sum is σ = 365246010. Its totient is φ = 97398928.

The previous prime is 194797853. The next prime is 194797873. The reversal of 194797864 is 468797491.

It can be written as a sum of positive squares in only one way, i.e., 194602500 + 195364 = 13950^2 + 442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12174859 + ... + 12174874.

Almost surely, 2^194797864 is an apocalyptic number.

It is an amenable number.

194797864 is a deficient number, since it is larger than the sum of its proper divisors (170448146).

194797864 is a wasteful number, since it uses less digits than its factorization.

194797864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24349739 (or 24349735 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The square root of 194797864 is about 13957.0005373648. Note that the first 3 decimals coincide. The cubic root of 194797864 is about 579.6885605030.

The spelling of 194797864 in words is "one hundred ninety-four million, seven hundred ninety-seven thousand, eight hundred sixty-four".