2291163639 has 4 divisors (see below), whose sum is σ = 3054884856. Its totient is φ = 1527442424.

The previous prime is 2291163629. The next prime is 2291163683. The reversal of 2291163639 is 9363611922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2291163639 - 2¹¹ = 2291161591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2291163639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291163629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381860604 + ... + 381860609.

It is an arithmetic number, because the mean of its divisors is an integer number (763721214).

Almost surely, 2^2291163639 is an apocalyptic number.

2291163639 is a deficient number, since it is larger than the sum of its proper divisors (763721217).

2291163639 is an equidigital number, since it uses as much as digits as its factorization.

2291163639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763721216.

The product of its digits is 104976, while the sum is 42.

The square root of 2291163639 is about 47866.1011468450. The cubic root of 2291163639 is about 1318.3135102111.

The spelling of 2291163639 in words is "two billion, two hundred ninety-one million, one hundred sixty-three thousand, six hundred thirty-nine".