1369557505 has 4 divisors (see below), whose sum is σ = 1643469012. Its totient is φ = 1095646000.

The previous prime is 1369557503. The next prime is 1369557523. The reversal of 1369557505 is 5057559631.

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 966712464 + 402845041 = 31092^2 + 20071^2 .

It is not a de Polignac number, because 1369557505 - 2¹ = 1369557503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1369557503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136955746 + ... + 136955755.

It is an arithmetic number, because the mean of its divisors is an integer number (410867253).

Almost surely, 2^1369557505 is an apocalyptic number.

It is an amenable number.

1369557505 is a deficient number, since it is larger than the sum of its proper divisors (273911507).

1369557505 is an equidigital number, since it uses as much as digits as its factorization.

1369557505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273911506.

The product of its (nonzero) digits is 708750, while the sum is 46.

The square root of 1369557505 is about 37007.5330844951. The cubic root of 1369557505 is about 1110.5209536890.

The spelling of 1369557505 in words is "one billion, three hundred sixty-nine million, five hundred fifty-seven thousand, five hundred five".