1798761449 has 4 divisors (see below), whose sum is σ = 1904570964. Its totient is φ = 1692951936.

The previous prime is 1798761443. The next prime is 1798761451. The reversal of 1798761449 is 9441678971.

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 1674037225 + 124724224 = 40915^2 + 11168^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1798761449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1798761394 and 1798761403.

It is not an unprimeable number, because it can be changed into a prime (1798761443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52904732 + ... + 52904765.

It is an arithmetic number, because the mean of its divisors is an integer number (476142741).

Almost surely, 2^1798761449 is an apocalyptic number.

It is an amenable number.

1798761449 is a deficient number, since it is larger than the sum of its proper divisors (105809515).

1798761449 is a wasteful number, since it uses less digits than its factorization.

1798761449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105809514.

The product of its digits is 3048192, while the sum is 56.

The square root of 1798761449 is about 42411.8078959150. The cubic root of 1798761449 is about 1216.1613307506.

The spelling of 1798761449 in words is "one billion, seven hundred ninety-eight million, seven hundred sixty-one thousand, four hundred forty-nine".