1085185819 has 2 divisors, whose sum is σ = 1085185820. Its totient is φ = 1085185818.

The previous prime is 1085185813. The next prime is 1085185831. The reversal of 1085185819 is 9185815801.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085185819 is a prime.

It is a super-2 number, since 2×1085185819² = 2355256523517401522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1085185813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542592909 + 542592910.

It is an arithmetic number, because the mean of its divisors is an integer number (542592910).

Almost surely, 2^1085185819 is an apocalyptic number.

1085185819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085185819 is an equidigital number, since it uses as much as digits as its factorization.

1085185819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 46.

The square root of 1085185819 is about 32942.1586876149. The cubic root of 1085185819 is about 1027.6250995459.

The spelling of 1085185819 in words is "one billion, eighty-five million, one hundred eighty-five thousand, eight hundred nineteen".