1916709091 has 12 divisors (see below), whose sum is σ = 2108586256. Its totient is φ = 1740982320.

The previous prime is 1916709089. The next prime is 1916709101. The reversal of 1916709091 is 1909076191.

It is a happy number.

It is not a de Polignac number, because 1916709091 - 2¹ = 1916709089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1916709061) 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 in 11 ways as a sum of consecutive naturals, for example, 151585 + ... + 163741.

Almost surely, 2^1916709091 is an apocalyptic number.

1916709091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1916709091 is a deficient number, since it is larger than the sum of its proper divisors (191877165).

1916709091 is a wasteful number, since it uses less digits than its factorization.

1916709091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13482 (or 13471 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 43.

The square root of 1916709091 is about 43780.2363058949. The cubic root of 1916709091 is about 1242.1824838206.

The spelling of 1916709091 in words is "one billion, nine hundred sixteen million, seven hundred nine thousand, ninety-one".