1369147861 has 4 divisors (see below), whose sum is σ = 1374237900. Its totient is φ = 1364057824.

The previous prime is 1369147817. The next prime is 1369147903. The reversal of 1369147861 is 1687419631.

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 148693636 + 1220454225 = 12194^2 + 34935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1369147861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369147361) 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, 2544616 + ... + 2545153.

It is an arithmetic number, because the mean of its divisors is an integer number (343559475).

Almost surely, 2^1369147861 is an apocalyptic number.

It is an amenable number.

1369147861 is a deficient number, since it is larger than the sum of its proper divisors (5090039).

1369147861 is an equidigital number, since it uses as much as digits as its factorization.

1369147861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090038.

The product of its digits is 217728, while the sum is 46.

The square root of 1369147861 is about 37001.9980676720. The cubic root of 1369147861 is about 1110.4102211817.

The spelling of 1369147861 in words is "one billion, three hundred sixty-nine million, one hundred forty-seven thousand, eight hundred sixty-one".