1969090845 has 32 divisors (see below), whose sum is σ = 3175096320. Its totient is φ = 1042030080.

The previous prime is 1969090813. The next prime is 1969090867. The reversal of 1969090845 is 5480909691.

It is not a de Polignac number, because 1969090845 - 2⁵ = 1969090813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1538916 + ... + 1540194.

It is an arithmetic number, because the mean of its divisors is an integer number (99221760).

Almost surely, 2^1969090845 is an apocalyptic number.

1969090845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1969090845 is a deficient number, since it is larger than the sum of its proper divisors (1206005475).

1969090845 is a wasteful number, since it uses less digits than its factorization.

1969090845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 1969090845 is about 44374.4390950466. The cubic root of 1969090845 is about 1253.3968079288.

The spelling of 1969090845 in words is "one billion, nine hundred sixty-nine million, ninety thousand, eight hundred forty-five".