1361136503 has 4 divisors (see below), whose sum is σ = 1366196760. Its totient is φ = 1356076248.

The previous prime is 1361136487. The next prime is 1361136509. The reversal of 1361136503 is 3056311631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361136503 - 2⁴ = 1361136487 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 (1361136509) 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, 2529725 + ... + 2530262.

It is an arithmetic number, because the mean of its divisors is an integer number (341549190).

Almost surely, 2^1361136503 is an apocalyptic number.

1361136503 is a deficient number, since it is larger than the sum of its proper divisors (5060257).

1361136503 is an equidigital number, since it uses as much as digits as its factorization.

1361136503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060256.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 1361136503 is about 36893.5834936104. The cubic root of 1361136503 is about 1108.2401849443.

The spelling of 1361136503 in words is "one billion, three hundred sixty-one million, one hundred thirty-six thousand, five hundred three".