1799959121 has 2 divisors, whose sum is σ = 1799959122. Its totient is φ = 1799959120.

The previous prime is 1799959097. The next prime is 1799959159. The reversal of 1799959121 is 1219599971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1700737600 + 99221521 = 41240^2 + 9961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1799959121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1799959171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899979560 + 899979561.

It is an arithmetic number, because the mean of its divisors is an integer number (899979561).

Almost surely, 2^1799959121 is an apocalyptic number.

It is an amenable number.

1799959121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799959121 is an equidigital number, since it uses as much as digits as its factorization.

1799959121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 53.

The square root of 1799959121 is about 42425.9251048224. The cubic root of 1799959121 is about 1216.4311903659.

The spelling of 1799959121 in words is "one billion, seven hundred ninety-nine million, nine hundred fifty-nine thousand, one hundred twenty-one".