1361920603 has 4 divisors (see below), whose sum is σ = 1363128040. Its totient is φ = 1360713168.

The previous prime is 1361920601. The next prime is 1361920607. The reversal of 1361920603 is 3060291631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3060291631 = 173 ⋅17689547.

It is a cyclic number.

It is not a de Polignac number, because 1361920603 - 2¹ = 1361920601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361920601) 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, 602025 + ... + 604282.

It is an arithmetic number, because the mean of its divisors is an integer number (340782010).

Almost surely, 2^1361920603 is an apocalyptic number.

1361920603 is a deficient number, since it is larger than the sum of its proper divisors (1207437).

1361920603 is a wasteful number, since it uses less digits than its factorization.

1361920603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207436.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1361920603 is about 36904.2084727474. The cubic root of 1361920603 is about 1108.4529493805.

The spelling of 1361920603 in words is "one billion, three hundred sixty-one million, nine hundred twenty thousand, six hundred three".