4144969091 has 2 divisors, whose sum is σ = 4144969092. Its totient is φ = 4144969090.

The previous prime is 4144969079. The next prime is 4144969097. The reversal of 4144969091 is 1909694414.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4144969091 is a prime.

It is not a weakly prime, because it can be changed into another prime (4144969097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072484545 + 2072484546.

It is an arithmetic number, because the mean of its divisors is an integer number (2072484546).

Almost surely, 2^4144969091 is an apocalyptic number.

4144969091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4144969091 is an equidigital number, since it uses as much as digits as its factorization.

4144969091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 4144969091 is about 64381.4343658170. The cubic root of 4144969091 is about 1606.3509413347.

The spelling of 4144969091 in words is "four billion, one hundred forty-four million, nine hundred sixty-nine thousand, ninety-one".