1830299561 has 2 divisors, whose sum is σ = 1830299562. Its totient is φ = 1830299560.

The previous prime is 1830299519. The next prime is 1830299567. The reversal of 1830299561 is 1659920381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134342400 + 695957161 = 33680^2 + 26381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830299561 - 2¹⁰ = 1830298537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1830299567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915149780 + 915149781.

It is an arithmetic number, because the mean of its divisors is an integer number (915149781).

Almost surely, 2^1830299561 is an apocalyptic number.

It is an amenable number.

1830299561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1830299561 is an equidigital number, since it uses as much as digits as its factorization.

1830299561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1830299561 is about 42782.0004324248. Note that the first 3 decimals coincide. The cubic root of 1830299561 is about 1223.2279386532.

The spelling of 1830299561 in words is "one billion, eight hundred thirty million, two hundred ninety-nine thousand, five hundred sixty-one".