1366156229 has 4 divisors (see below), whose sum is σ = 1366289676. Its totient is φ = 1366022784.

The previous prime is 1366156219. The next prime is 1366156241. The reversal of 1366156229 is 9226516631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 925072225 + 441084004 = 30415^2 + 21002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1366156229 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 (1366156219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49964 + ... + 72309.

It is an arithmetic number, because the mean of its divisors is an integer number (341572419).

Almost surely, 2^1366156229 is an apocalyptic number.

It is an amenable number.

1366156229 is a deficient number, since it is larger than the sum of its proper divisors (133447).

1366156229 is a wasteful number, since it uses less digits than its factorization.

1366156229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133446.

The product of its digits is 116640, while the sum is 41.

The square root of 1366156229 is about 36961.5506844613. The cubic root of 1366156229 is about 1109.6008707574.

The spelling of 1366156229 in words is "one billion, three hundred sixty-six million, one hundred fifty-six thousand, two hundred twenty-nine".