1085556019 has 2 divisors, whose sum is σ = 1085556020. Its totient is φ = 1085556018.

The previous prime is 1085556011. The next prime is 1085556023. The reversal of 1085556019 is 9106555801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1085556019 - 2³ = 1085556011 is a prime.

It is a super-2 number, since 2×1085556019² = 2356863740774256722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1085556011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542778009 + 542778010.

It is an arithmetic number, because the mean of its divisors is an integer number (542778010).

Almost surely, 2^1085556019 is an apocalyptic number.

1085556019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085556019 is an equidigital number, since it uses as much as digits as its factorization.

1085556019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 1085556019 is about 32947.7771480869. Note that the first 3 decimals coincide. The cubic root of 1085556019 is about 1027.7419408443.

The spelling of 1085556019 in words is "one billion, eighty-five million, five hundred fifty-six thousand, nineteen".