196786905 has 40 divisors (see below), whose sum is σ = 369834432. Its totient is φ = 87528384.

The previous prime is 196786879. The next prime is 196786913. The reversal of 196786905 is 509687691.

It is not a de Polignac number, because 196786905 - 2⁶ = 196786841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5318547 + ... + 5318583.

Almost surely, 2^196786905 is an apocalyptic number.

196786905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

196786905 is a deficient number, since it is larger than the sum of its proper divisors (173047527).

196786905 is an frugal number, since it uses more digits than its factorization.

196786905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 196786905 is about 14028.0755985987. The cubic root of 196786905 is about 581.6549099118.

The spelling of 196786905 in words is "one hundred ninety-six million, seven hundred eighty-six thousand, nine hundred five".