1380523049 has 4 divisors (see below), whose sum is σ = 1380757764. Its totient is φ = 1380288336.

The previous prime is 1380523037. The next prime is 1380523073. The reversal of 1380523049 is 9403250831.

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 221801449 + 1158721600 = 14893^2 + 34040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380523049 - 2¹⁶ = 1380457513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380523099) 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, 108302 + ... + 120375.

It is an arithmetic number, because the mean of its divisors is an integer number (345189441).

Almost surely, 2^1380523049 is an apocalyptic number.

It is an amenable number.

1380523049 is a deficient number, since it is larger than the sum of its proper divisors (234715).

1380523049 is an equidigital number, since it uses as much as digits as its factorization.

1380523049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234714.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1380523049 is about 37155.3905779498. The cubic root of 1380523049 is about 1113.4769230360.

The spelling of 1380523049 in words is "one billion, three hundred eighty million, five hundred twenty-three thousand, forty-nine".