1361089997 has 8 divisors (see below), whose sum is σ = 1395084600. Its totient is φ = 1327133440.

The previous prime is 1361089963. The next prime is 1361090009. The reversal of 1361089997 is 7999801631.

It can be written as a sum of positive squares in 4 ways, for example, as 22335076 + 1338754921 = 4726^2 + 36589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1361089997 - 2²² = 1356895693 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 (1361089907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71393 + ... + 88425.

It is an arithmetic number, because the mean of its divisors is an integer number (174385575).

Almost surely, 2^1361089997 is an apocalyptic number.

It is an amenable number.

1361089997 is a deficient number, since it is larger than the sum of its proper divisors (33994603).

1361089997 is a wasteful number, since it uses less digits than its factorization.

1361089997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19023.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 1361089997 is about 36892.9532160276. The cubic root of 1361089997 is about 1108.2275630398.

The spelling of 1361089997 in words is "one billion, three hundred sixty-one million, eighty-nine thousand, nine hundred ninety-seven".