868197049 has 2 divisors, whose sum is σ = 868197050. Its totient is φ = 868197048.

The previous prime is 868197023. The next prime is 868197053. The reversal of 868197049 is 940791868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780643600 + 87553449 = 27940^2 + 9357^2 .

It is a cyclic number.

It is not a de Polignac number, because 868197049 - 2¹¹ = 868195001 is a prime.

It is a super-2 number, since 2×868197049² = 1507532231784616802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 868196987 and 868197005.

It is not a weakly prime, because it can be changed into another prime (868197059) 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, 434098524 + 434098525.

It is an arithmetic number, because the mean of its divisors is an integer number (434098525).

Almost surely, 2^868197049 is an apocalyptic number.

It is an amenable number.

868197049 is a deficient number, since it is larger than the sum of its proper divisors (1).

868197049 is an equidigital number, since it uses as much as digits as its factorization.

868197049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 868197049 is about 29465.1836749748. The cubic root of 868197049 is about 953.9803629048.

The spelling of 868197049 in words is "eight hundred sixty-eight million, one hundred ninety-seven thousand, forty-nine".