2291397389 has 8 divisors (see below), whose sum is σ = 2355297912. Its totient is φ = 2228262400.

The previous prime is 2291397371. The next prime is 2291397391. The reversal of 2291397389 is 9837931922.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32296489 + 2259100900 = 5683^2 + 47530^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2291397389 - 2¹⁶ = 2291331853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2291397389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291397349) 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, 185312 + ... + 197289.

It is an arithmetic number, because the mean of its divisors is an integer number (294412239).

Almost surely, 2^2291397389 is an apocalyptic number.

It is an amenable number.

2291397389 is a deficient number, since it is larger than the sum of its proper divisors (63900523).

2291397389 is a wasteful number, since it uses less digits than its factorization.

2291397389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382767.

The product of its digits is 1469664, while the sum is 53.

The square root of 2291397389 is about 47868.5427916915. The cubic root of 2291397389 is about 1318.3583411868.

The spelling of 2291397389 in words is "two billion, two hundred ninety-one million, three hundred ninety-seven thousand, three hundred eighty-nine".