1386170491 has 2 divisors, whose sum is σ = 1386170492. Its totient is φ = 1386170490.

The previous prime is 1386170477. The next prime is 1386170503. The reversal of 1386170491 is 1940716831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1940716831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1386170491 - 2⁹ = 1386169979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1386170431) 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 as a sum of consecutive naturals, namely, 693085245 + 693085246.

It is an arithmetic number, because the mean of its divisors is an integer number (693085246).

Almost surely, 2^1386170491 is an apocalyptic number.

1386170491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386170491 is an equidigital number, since it uses as much as digits as its factorization.

1386170491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1386170491 is about 37231.3106269441. The cubic root of 1386170491 is about 1114.9931940035.

The spelling of 1386170491 in words is "one billion, three hundred eighty-six million, one hundred seventy thousand, four hundred ninety-one".