1379887 has 2 divisors, whose sum is σ = 1379888. Its totient is φ = 1379886.

The previous prime is 1379879. The next prime is 1379897. The reversal of 1379887 is 7889731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1379887 - 2³ = 1379879 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1379857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689943 + 689944.

It is an arithmetic number, because the mean of its divisors is an integer number (689944).

2^1379887 is an apocalyptic number.

1379887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379887 is an equidigital number, since it uses as much as digits as its factorization.

1379887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 1379887 is about 1174.6859154685. The cubic root of 1379887 is about 111.3305892527.

The spelling of 1379887 in words is "one million, three hundred seventy-nine thousand, eight hundred eighty-seven".