2190742709 has 16 divisors (see below), whose sum is σ = 2391621120. Its totient is φ = 2000845440.

The previous prime is 2190742703. The next prime is 2190742733. The reversal of 2190742709 is 9072470912.

It is a de Polignac number, because none of the positive numbers 2^k-2190742709 is a prime.

It is a super-3 number, since 3×2190742709³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190742703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19607 + ... + 69035.

It is an arithmetic number, because the mean of its divisors is an integer number (149476320).

Almost surely, 2^2190742709 is an apocalyptic number.

It is an amenable number.

2190742709 is a deficient number, since it is larger than the sum of its proper divisors (200878411).

2190742709 is a wasteful number, since it uses less digits than its factorization.

2190742709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49540.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 2190742709 is about 46805.3705145040. The cubic root of 2190742709 is about 1298.7646467662.

The spelling of 2190742709 in words is "two billion, one hundred ninety million, seven hundred forty-two thousand, seven hundred nine".