1387386311 has 4 divisors (see below), whose sum is σ = 1389544632. Its totient is φ = 1385227992.

The previous prime is 1387386281. The next prime is 1387386313. The reversal of 1387386311 is 1136837831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1136837831 = 15629 ⋅72739.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387386311 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 (1387386313) 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, 1078196 + ... + 1079481.

It is an arithmetic number, because the mean of its divisors is an integer number (347386158).

Almost surely, 2^1387386311 is an apocalyptic number.

1387386311 is a deficient number, since it is larger than the sum of its proper divisors (2158321).

1387386311 is an equidigital number, since it uses as much as digits as its factorization.

1387386311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158320.

The product of its digits is 72576, while the sum is 41.

The square root of 1387386311 is about 37247.6349719012. The cubic root of 1387386311 is about 1115.3190882285.

The spelling of 1387386311 in words is "one billion, three hundred eighty-seven million, three hundred eighty-six thousand, three hundred eleven".