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196899191 is a prime number
BaseRepresentation
bin10111011110001…
…11000101110111
3111201111111220122
423233013011313
5400401233231
631312122155
74610421056
oct1357070567
9451444818
10196899191
11a1165305
1255b3635b
1331a3cac8
141c21639d
151244577b
hexbbc7177

196899191 has 2 divisors, whose sum is σ = 196899192. Its totient is φ = 196899190.

The previous prime is 196899167. The next prime is 196899211. The reversal of 196899191 is 191998691.

It is a strong prime.

It is an emirp because it is prime and its reverse (191998691) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 161668961 and 169866161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-196899191 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196899091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98449595 + 98449596.

It is an arithmetic number, because the mean of its divisors is an integer number (98449596).

Almost surely, 2196899191 is an apocalyptic number.

196899191 is a deficient number, since it is larger than the sum of its proper divisors (1).

196899191 is an equidigital number, since it uses as much as digits as its factorization.

196899191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 53.

The square root of 196899191 is about 14032.0772161501. The cubic root of 196899191 is about 581.7655190416.

The spelling of 196899191 in words is "one hundred ninety-six million, eight hundred ninety-nine thousand, one hundred ninety-one".