1868196247 has 2 divisors, whose sum is σ = 1868196248. Its totient is φ = 1868196246.

The previous prime is 1868196199. The next prime is 1868196257. The reversal of 1868196247 is 7426918681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868196247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868196194 and 1868196203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868196257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934098123 + 934098124.

It is an arithmetic number, because the mean of its divisors is an integer number (934098124).

Almost surely, 2^1868196247 is an apocalyptic number.

1868196247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868196247 is an equidigital number, since it uses as much as digits as its factorization.

1868196247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 1868196247 is about 43222.6358173585. The cubic root of 1868196247 is about 1231.6127185379.

The spelling of 1868196247 in words is "one billion, eight hundred sixty-eight million, one hundred ninety-six thousand, two hundred forty-seven".