1098783779 has 2 divisors, whose sum is σ = 1098783780. Its totient is φ = 1098783778.

The previous prime is 1098783767. The next prime is 1098783781. The reversal of 1098783779 is 9773878901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098783779 is a prime.

Together with 1098783781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1098783479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549391889 + 549391890.

It is an arithmetic number, because the mean of its divisors is an integer number (549391890).

Almost surely, 2^1098783779 is an apocalyptic number.

1098783779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098783779 is an equidigital number, since it uses as much as digits as its factorization.

1098783779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 59.

The square root of 1098783779 is about 33147.9076111902. The cubic root of 1098783779 is about 1031.8995264417.

The spelling of 1098783779 in words is "one billion, ninety-eight million, seven hundred eighty-three thousand, seven hundred seventy-nine".