1366910939 has 4 divisors (see below), whose sum is σ = 1438853640. Its totient is φ = 1294968240.

The previous prime is 1366910927. The next prime is 1366910947. The reversal of 1366910939 is 9390196631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9390196631 = 35251 ⋅266381.

It is a cyclic number.

It is not a de Polignac number, because 1366910939 - 2¹² = 1366906843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1366910893 and 1366910902.

It is not an unprimeable number, because it can be changed into a prime (1366918939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35971322 + ... + 35971359.

It is an arithmetic number, because the mean of its divisors is an integer number (359713410).

Almost surely, 2^1366910939 is an apocalyptic number.

1366910939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1366910939 is a deficient number, since it is larger than the sum of its proper divisors (71942701).

1366910939 is an equidigital number, since it uses as much as digits as its factorization.

1366910939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71942700.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 1366910939 is about 36971.7586679346. The cubic root of 1366910939 is about 1109.8051599144.

The spelling of 1366910939 in words is "one billion, three hundred sixty-six million, nine hundred ten thousand, nine hundred thirty-nine".