1387877 has 2 divisors, whose sum is σ = 1387878. Its totient is φ = 1387876.

The previous prime is 1387871. The next prime is 1387879. The reversal of 1387877 is 7787831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1366561 + 21316 = 1169^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387877 - 2¹⁴ = 1371493 is a prime.

Together with 1387879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387871) 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, 693938 + 693939.

It is an arithmetic number, because the mean of its divisors is an integer number (693939).

2^1387877 is an apocalyptic number.

It is an amenable number.

1387877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387877 is an equidigital number, since it uses as much as digits as its factorization.

1387877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 41.

The square root of 1387877 is about 1178.0819156578. The cubic root of 1387877 is about 111.5450560935.

The spelling of 1387877 in words is "one million, three hundred eighty-seven thousand, eight hundred seventy-seven".