196399783 has 4 divisors (see below), whose sum is σ = 204938928. Its totient is φ = 187860640.

The previous prime is 196399781. The next prime is 196399813. The reversal of 196399783 is 387993691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387993691 = 10639 ⋅36469.

It is a cyclic number.

It is not a de Polignac number, because 196399783 - 2¹ = 196399781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196399781) 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, 4269538 + ... + 4269583.

It is an arithmetic number, because the mean of its divisors is an integer number (51234732).

Almost surely, 2^196399783 is an apocalyptic number.

196399783 is a deficient number, since it is larger than the sum of its proper divisors (8539145).

196399783 is an equidigital number, since it uses as much as digits as its factorization.

196399783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539144.

The product of its digits is 2204496, while the sum is 55.

The square root of 196399783 is about 14014.2706909778. The cubic root of 196399783 is about 581.2732462588.

The spelling of 196399783 in words is "one hundred ninety-six million, three hundred ninety-nine thousand, seven hundred eighty-three".