1361918939 has 8 divisors (see below), whose sum is σ = 1407277440. Its totient is φ = 1316649600.

The previous prime is 1361918933. The next prime is 1361918963. The reversal of 1361918939 is 9398191631.

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 1361918939 - 2¹² = 1361914843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361918933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9509 + ... + 53049.

It is an arithmetic number, because the mean of its divisors is an integer number (175909680).

Almost surely, 2^1361918939 is an apocalyptic number.

1361918939 is a deficient number, since it is larger than the sum of its proper divisors (45358501).

1361918939 is a wasteful number, since it uses less digits than its factorization.

1361918939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44581.

The product of its digits is 314928, while the sum is 50.

The square root of 1361918939 is about 36904.1859278863. The cubic root of 1361918939 is about 1108.4524979429.

The spelling of 1361918939 in words is "one billion, three hundred sixty-one million, nine hundred eighteen thousand, nine hundred thirty-nine".