1198105061 has 2 divisors, whose sum is σ = 1198105062. Its totient is φ = 1198105060.

The previous prime is 1198105003. The next prime is 1198105063. The reversal of 1198105061 is 1605018911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 798345025 + 399760036 = 28255^2 + 19994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198105061 - 2⁶ = 1198104997 is a prime.

It is a Sophie Germain prime.

Together with 1198105063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198105063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599052530 + 599052531.

It is an arithmetic number, because the mean of its divisors is an integer number (599052531).

Almost surely, 2^1198105061 is an apocalyptic number.

It is an amenable number.

1198105061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198105061 is an equidigital number, since it uses as much as digits as its factorization.

1198105061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 32.

The square root of 1198105061 is about 34613.6542566658. The cubic root of 1198105061 is about 1062.0989208386.

The spelling of 1198105061 in words is "one billion, one hundred ninety-eight million, one hundred five thousand, sixty-one".