196881851 has 2 divisors, whose sum is σ = 196881852. Its totient is φ = 196881850.

The previous prime is 196881829. The next prime is 196881871. The reversal of 196881851 is 158188691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196881851 - 2⁶ = 196881787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196881796 and 196881805.

It is not a weakly prime, because it can be changed into another prime (196881871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98440925 + 98440926.

It is an arithmetic number, because the mean of its divisors is an integer number (98440926).

Almost surely, 2^196881851 is an apocalyptic number.

196881851 is a deficient number, since it is larger than the sum of its proper divisors (1).

196881851 is an equidigital number, since it uses as much as digits as its factorization.

196881851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 47.

The square root of 196881851 is about 14031.4593325142. The cubic root of 196881851 is about 581.7484407418.

The spelling of 196881851 in words is "one hundred ninety-six million, eight hundred eighty-one thousand, eight hundred fifty-one".