1369636109 has 4 divisors (see below), whose sum is σ = 1441722240. Its totient is φ = 1297549980.

The previous prime is 1369636091. The next prime is 1369636133. The reversal of 1369636109 is 9016369631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9016369631 = 65981 ⋅136651.

It is a cyclic number.

It is not a de Polignac number, because 1369636109 - 2²⁴ = 1352858893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1369636109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369636139) 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, 36043037 + ... + 36043074.

It is an arithmetic number, because the mean of its divisors is an integer number (360430560).

Almost surely, 2^1369636109 is an apocalyptic number.

1369636109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1369636109 is a deficient number, since it is larger than the sum of its proper divisors (72086131).

1369636109 is an equidigital number, since it uses as much as digits as its factorization.

1369636109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72086130.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 1369636109 is about 37008.5950692538. The cubic root of 1369636109 is about 1110.5421989255.

The spelling of 1369636109 in words is "one billion, three hundred sixty-nine million, six hundred thirty-six thousand, one hundred nine".