196909690 has 16 divisors (see below), whose sum is σ = 357230592. Its totient is φ = 78143184.

The previous prime is 196909679. The next prime is 196909703. The reversal of 196909690 is 96909691.

It is a happy number.

It is a super-2 number, since 2×196909690² = 77546852031792200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76254 + ... + 78793.

It is an arithmetic number, because the mean of its divisors is an integer number (22326912).

Almost surely, 2^196909690 is an apocalyptic number.

196909690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196909690 is a deficient number, since it is larger than the sum of its proper divisors (160320902).

196909690 is a wasteful number, since it uses less digits than its factorization.

196909690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155181.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 196909690 is about 14032.4513182836. The cubic root of 196909690 is about 581.7758591003.

Subtracting from 196909690 its reverse (96909691), we obtain a palindrome (99999999).

The spelling of 196909690 in words is "one hundred ninety-six million, nine hundred nine thousand, six hundred ninety".