1985069019 has 8 divisors (see below), whose sum is σ = 2647094032. Its totient is φ = 1323211680.

The previous prime is 1985069003. The next prime is 1985069059. The reversal of 1985069019 is 9109605891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1985069019 - 2⁴ = 1985069003 is a prime.

It is a super-2 number, since 2×1985069019² = 7880998020387244722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985069059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11044 + ... + 63969.

It is an arithmetic number, because the mean of its divisors is an integer number (330886754).

Almost surely, 2^1985069019 is an apocalyptic number.

1985069019 is a deficient number, since it is larger than the sum of its proper divisors (662025013).

1985069019 is an equidigital number, since it uses as much as digits as its factorization.

1985069019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83837.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 1985069019 is about 44554.1133791258. The cubic root of 1985069019 is about 1256.7779056225. Note that the first 3 decimals are identical.

The spelling of 1985069019 in words is "one billion, nine hundred eighty-five million, sixty-nine thousand, nineteen".