1779942449 has 8 divisors (see below), whose sum is σ = 1885470048. Its totient is φ = 1674506560.

The previous prime is 1779942433. The next prime is 1779942467. The reversal of 1779942449 is 9442499771.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1779942449 - 2⁴ = 1779942433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1779942394 and 1779942403.

It is not an unprimeable number, because it can be changed into a prime (1779942349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19274 + ... + 62700.

It is an arithmetic number, because the mean of its divisors is an integer number (235683756).

Almost surely, 2^1779942449 is an apocalyptic number.

It is an amenable number.

1779942449 is a deficient number, since it is larger than the sum of its proper divisors (105527599).

1779942449 is a wasteful number, since it uses less digits than its factorization.

1779942449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45855.

The product of its digits is 4572288, while the sum is 56.

The square root of 1779942449 is about 42189.3641691837. The cubic root of 1779942449 is about 1211.9052127090.

The spelling of 1779942449 in words is "one billion, seven hundred seventy-nine million, nine hundred forty-two thousand, four hundred forty-nine".