1366379749 has 6 divisors (see below), whose sum is σ = 1589462214. Its totient is φ = 1171182600.

The previous prime is 1366379719. The next prime is 1366379753. The reversal of 1366379749 is 9479736631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1362938724 + 3441025 = 36918^2 + 1855^2 .

It is not a de Polignac number, because 1366379749 - 2⁵ = 1366379717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1366379749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366379719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13942602 + ... + 13942699.

It is an arithmetic number, because the mean of its divisors is an integer number (264910369).

Almost surely, 2^1366379749 is an apocalyptic number.

It is an amenable number.

1366379749 is a deficient number, since it is larger than the sum of its proper divisors (223082465).

1366379749 is an equidigital number, since it uses as much as digits as its factorization.

1366379749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27885315 (or 27885308 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 55.

The square root of 1366379749 is about 36964.5742434564. The cubic root of 1366379749 is about 1109.6613822510.

The spelling of 1366379749 in words is "one billion, three hundred sixty-six million, three hundred seventy-nine thousand, seven hundred forty-nine".