1389877 has 2 divisors, whose sum is σ = 1389878. Its totient is φ = 1389876.

The previous prime is 1389853. The next prime is 1389887. The reversal of 1389877 is 7789831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998001 + 391876 = 999^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389877 - 2⁷ = 1389749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389887) 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, 694938 + 694939.

It is an arithmetic number, because the mean of its divisors is an integer number (694939).

2^1389877 is an apocalyptic number.

It is an amenable number.

1389877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389877 is an equidigital number, since it uses as much as digits as its factorization.

1389877 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 1389877 is about 1178.9304474820. The cubic root of 1389877 is about 111.5986110403.

The spelling of 1389877 in words is "one million, three hundred eighty-nine thousand, eight hundred seventy-seven".