2091709149 has 8 divisors (see below), whose sum is σ = 2824248960. Its totient is φ = 1376821056.

The previous prime is 2091709057. The next prime is 2091709163. The reversal of 2091709149 is 9419071902.

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

It is not a de Polignac number, because 2091709149 - 2¹³ = 2091700957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091709149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091709199) 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, 4412652 + ... + 4413125.

It is an arithmetic number, because the mean of its divisors is an integer number (353031120).

Almost surely, 2^2091709149 is an apocalyptic number.

It is an amenable number.

2091709149 is a deficient number, since it is larger than the sum of its proper divisors (732539811).

2091709149 is an equidigital number, since it uses as much as digits as its factorization.

2091709149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825859.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 2091709149 is about 45735.2068870362. The cubic root of 2091709149 is about 1278.8916897565.

The spelling of 2091709149 in words is "two billion, ninety-one million, seven hundred nine thousand, one hundred forty-nine".