196897951 has 2 divisors, whose sum is σ = 196897952. Its totient is φ = 196897950.

The previous prime is 196897937. The next prime is 196898017. The reversal of 196897951 is 159798691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196897951 - 2¹⁵ = 196865183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196897892 and 196897901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196897751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98448975 + 98448976.

It is an arithmetic number, because the mean of its divisors is an integer number (98448976).

Almost surely, 2^196897951 is an apocalyptic number.

196897951 is a deficient number, since it is larger than the sum of its proper divisors (1).

196897951 is an equidigital number, since it uses as much as digits as its factorization.

196897951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 55.

The square root of 196897951 is about 14032.0330316031. The cubic root of 196897951 is about 581.7642977893.

The spelling of 196897951 in words is "one hundred ninety-six million, eight hundred ninety-seven thousand, nine hundred fifty-one".