2811089921 has 2 divisors, whose sum is σ = 2811089922. Its totient is φ = 2811089920.

The previous prime is 2811089917. The next prime is 2811090001. The reversal of 2811089921 is 1299801182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2281399696 + 529690225 = 47764^2 + 23015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2811089921 - 2² = 2811089917 is a prime.

It is not a weakly prime, because it can be changed into another prime (2811089821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405544960 + 1405544961.

It is an arithmetic number, because the mean of its divisors is an integer number (1405544961).

Almost surely, 2^2811089921 is an apocalyptic number.

It is an amenable number.

2811089921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811089921 is an equidigital number, since it uses as much as digits as its factorization.

2811089921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 41.

The square root of 2811089921 is about 53019.7125699489. The cubic root of 2811089921 is about 1411.3181043060.

The spelling of 2811089921 in words is "two billion, eight hundred eleven million, eighty-nine thousand, nine hundred twenty-one".