1098239771 has 2 divisors, whose sum is σ = 1098239772. Its totient is φ = 1098239770.

The previous prime is 1098239731. The next prime is 1098239777. The reversal of 1098239771 is 1779328901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1098239771 - 2¹⁰ = 1098238747 is a prime.

It is a super-2 number, since 2×1098239771² = 2412261189212264882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1098239777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549119885 + 549119886.

It is an arithmetic number, because the mean of its divisors is an integer number (549119886).

Almost surely, 2^1098239771 is an apocalyptic number.

1098239771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098239771 is an equidigital number, since it uses as much as digits as its factorization.

1098239771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 1098239771 is about 33139.7008284625. The cubic root of 1098239771 is about 1031.7292004633.

The spelling of 1098239771 in words is "one billion, ninety-eight million, two hundred thirty-nine thousand, seven hundred seventy-one".