1384479749 has 8 divisors (see below), whose sum is σ = 1433005560. Its totient is φ = 1336006336.

The previous prime is 1384479721. The next prime is 1384479763. The reversal of 1384479749 is 9479744831.

It can be written as a sum of positive squares in 4 ways, for example, as 17698849 + 1366780900 = 4207^2 + 36970^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1384479749 is a prime.

It is a super-2 number, since 2×1384479749² = 3833568350782206002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1384479694 and 1384479703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384479769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45119 + ... + 69315.

It is an arithmetic number, because the mean of its divisors is an integer number (179125695).

Almost surely, 2^1384479749 is an apocalyptic number.

It is an amenable number.

1384479749 is a deficient number, since it is larger than the sum of its proper divisors (48525811).

1384479749 is a wasteful number, since it uses less digits than its factorization.

1384479749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26199.

The product of its digits is 6096384, while the sum is 56.

The square root of 1384479749 is about 37208.5977833081. The cubic root of 1384479749 is about 1114.5396824973.

The spelling of 1384479749 in words is "one billion, three hundred eighty-four million, four hundred seventy-nine thousand, seven hundred forty-nine".