1387699 has 4 divisors (see below), whose sum is σ = 1413936. Its totient is φ = 1361464.

The previous prime is 1387691. The next prime is 1387717. The reversal of 1387699 is 9967831.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1387699 - 2³ = 1387691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387691) 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 in 3 ways as a sum of consecutive naturals, for example, 13039 + ... + 13144.

It is an arithmetic number, because the mean of its divisors is an integer number (353484).

2^1387699 is an apocalyptic number.

1387699 is a deficient number, since it is larger than the sum of its proper divisors (26237).

1387699 is an equidigital number, since it uses as much as digits as its factorization.

1387699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26236.

The product of its digits is 81648, while the sum is 43.

The square root of 1387699 is about 1178.0063667061. The cubic root of 1387699 is about 111.5402872106.

The spelling of 1387699 in words is "one million, three hundred eighty-seven thousand, six hundred ninety-nine".