1096619861 has 2 divisors, whose sum is σ = 1096619862. Its totient is φ = 1096619860.

The previous prime is 1096619837. The next prime is 1096619863. The reversal of 1096619861 is 1689166901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060739761 + 35880100 = 32569^2 + 5990^2 .

It is an emirp because it is prime and its reverse (1689166901) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1986199601 and 1069916891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1096619861 is a prime.

Together with 1096619863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1096619863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548309930 + 548309931.

It is an arithmetic number, because the mean of its divisors is an integer number (548309931).

Almost surely, 2^1096619861 is an apocalyptic number.

It is an amenable number.

1096619861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1096619861 is an equidigital number, since it uses as much as digits as its factorization.

1096619861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 1096619861 is about 33115.2511843108. The cubic root of 1096619861 is about 1031.2216820091.

The spelling of 1096619861 in words is "one billion, ninety-six million, six hundred nineteen thousand, eight hundred sixty-one".