196018919 has 2 divisors, whose sum is σ = 196018920. Its totient is φ = 196018918.

The previous prime is 196018913. The next prime is 196018931. The reversal of 196018919 is 919810691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196018919 - 2¹² = 196014823 is a prime.

It is a super-2 number, since 2×196018919² = 76846833211857122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196018919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196018913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98009459 + 98009460.

It is an arithmetic number, because the mean of its divisors is an integer number (98009460).

Almost surely, 2^196018919 is an apocalyptic number.

196018919 is a deficient number, since it is larger than the sum of its proper divisors (1).

196018919 is an equidigital number, since it uses as much as digits as its factorization.

196018919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 196018919 is about 14000.6756622672. The cubic root of 196018919 is about 580.8972626219.

The spelling of 196018919 in words is "one hundred ninety-six million, eighteen thousand, nine hundred nineteen".