1383657705 has 24 divisors (see below), whose sum is σ = 2399277192. Its totient is φ = 737662464.

The previous prime is 1383657703. The next prime is 1383657731. The reversal of 1383657705 is 5077563831.

1383657705 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 217503504 + 1166154201 = 14748^2 + 34149^2 .

It is not a de Polignac number, because 1383657705 - 2¹ = 1383657703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1383657701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162207 + ... + 170523.

It is an arithmetic number, because the mean of its divisors is an integer number (99969883).

Almost surely, 2^1383657705 is an apocalyptic number.

1383657705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1383657705 is a deficient number, since it is larger than the sum of its proper divisors (1015619487).

1383657705 is a wasteful number, since it uses less digits than its factorization.

1383657705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12025 (or 12022 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 1383657705 is about 37197.5497176897. The cubic root of 1383657705 is about 1114.3190503904.

It can be divided in two parts, 138365 and 7705, that added together give a triangular number (146070 = T₅₄₀).

The spelling of 1383657705 in words is "one billion, three hundred eighty-three million, six hundred fifty-seven thousand, seven hundred five".