1386128311 has 2 divisors, whose sum is σ = 1386128312. Its totient is φ = 1386128310.

The previous prime is 1386128291. The next prime is 1386128329. The reversal of 1386128311 is 1138216831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1386128311 - 2¹³ = 1386120119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386128111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693064155 + 693064156.

It is an arithmetic number, because the mean of its divisors is an integer number (693064156).

Almost surely, 2^1386128311 is an apocalyptic number.

1386128311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386128311 is an equidigital number, since it uses as much as digits as its factorization.

1386128311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 1386128311 is about 37230.7441639299. The cubic root of 1386128311 is about 1114.9818844543.

The spelling of 1386128311 in words is "one billion, three hundred eighty-six million, one hundred twenty-eight thousand, three hundred eleven".