196217405 has 4 divisors (see below), whose sum is σ = 235460892. Its totient is φ = 156973920.

The previous prime is 196217387. The next prime is 196217407. The reversal of 196217405 is 504712691.

196217405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 113443801 + 82773604 = 10651^2 + 9098^2 .

It is not a de Polignac number, because 196217405 - 2¹² = 196213309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196217407) 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, 19621736 + ... + 19621745.

It is an arithmetic number, because the mean of its divisors is an integer number (58865223).

Almost surely, 2^196217405 is an apocalyptic number.

It is an amenable number.

196217405 is a deficient number, since it is larger than the sum of its proper divisors (39243487).

196217405 is an equidigital number, since it uses as much as digits as its factorization.

196217405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39243486.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 196217405 is about 14007.7623123752. The cubic root of 196217405 is about 581.0932659457.

The spelling of 196217405 in words is "one hundred ninety-six million, two hundred seventeen thousand, four hundred five".