1387499 has 2 divisors, whose sum is σ = 1387500. Its totient is φ = 1387498.

The previous prime is 1387433. The next prime is 1387501. The reversal of 1387499 is 9947831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387499 is a prime.

Together with 1387501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1380499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693749 + 693750.

It is an arithmetic number, because the mean of its divisors is an integer number (693750).

2^1387499 is an apocalyptic number.

1387499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387499 is an equidigital number, since it uses as much as digits as its factorization.

1387499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 1387499 is about 1177.9214744625. The cubic root of 1387499 is about 111.5349284286.

The spelling of 1387499 in words is "one million, three hundred eighty-seven thousand, four hundred ninety-nine".