1799242661 has 4 divisors (see below), whose sum is σ = 1801965324. Its totient is φ = 1796520000.

The previous prime is 1799242591. The next prime is 1799242691. The reversal of 1799242661 is 1662429971.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1126877761 + 672364900 = 33569^2 + 25930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799242661 - 2¹⁸ = 1798980517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799242691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360340 + ... + 1361661.

It is an arithmetic number, because the mean of its divisors is an integer number (450491331).

Almost surely, 2^1799242661 is an apocalyptic number.

It is an amenable number.

1799242661 is a deficient number, since it is larger than the sum of its proper divisors (2722663).

1799242661 is an equidigital number, since it uses as much as digits as its factorization.

1799242661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722662.

The product of its digits is 326592, while the sum is 47.

The square root of 1799242661 is about 42417.4806064670. The cubic root of 1799242661 is about 1216.2697718943.

The spelling of 1799242661 in words is "one billion, seven hundred ninety-nine million, two hundred forty-two thousand, six hundred sixty-one".