1385661223 has 2 divisors, whose sum is σ = 1385661224. Its totient is φ = 1385661222.

The previous prime is 1385661217. The next prime is 1385661269. The reversal of 1385661223 is 3221665831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1385661223 - 2²⁹ = 848790311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385661023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692830611 + 692830612.

It is an arithmetic number, because the mean of its divisors is an integer number (692830612).

Almost surely, 2^1385661223 is an apocalyptic number.

1385661223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385661223 is an equidigital number, since it uses as much as digits as its factorization.

1385661223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 1385661223 is about 37224.4707551363. The cubic root of 1385661223 is about 1114.8566307379.

The spelling of 1385661223 in words is "one billion, three hundred eighty-five million, six hundred sixty-one thousand, two hundred twenty-three".