196926409 has 4 divisors (see below), whose sum is σ = 196961220. Its totient is φ = 196891600.

The previous prime is 196926407. The next prime is 196926413. The reversal of 196926409 is 904629691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52998400 + 143928009 = 7280^2 + 11997^2 .

It is a cyclic number.

It is not a de Polignac number, because 196926409 - 2¹ = 196926407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196926407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (49240305).

Almost surely, 2^196926409 is an apocalyptic number.

It is an amenable number.

196926409 is a deficient number, since it is larger than the sum of its proper divisors (34811).

196926409 is an equidigital number, since it uses as much as digits as its factorization.

196926409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34810.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 196926409 is about 14033.0470319172. The cubic root of 196926409 is about 581.7923242378.

The spelling of 196926409 in words is "one hundred ninety-six million, nine hundred twenty-six thousand, four hundred nine".