1379687 has 4 divisors (see below), whose sum is σ = 1388976. Its totient is φ = 1370400.

The previous prime is 1379681. The next prime is 1379699. The reversal of 1379687 is 7869731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1379687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379681) 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, 4418 + ... + 4719.

It is an arithmetic number, because the mean of its divisors is an integer number (347244).

2^1379687 is an apocalyptic number.

1379687 is a deficient number, since it is larger than the sum of its proper divisors (9289).

1379687 is an equidigital number, since it uses as much as digits as its factorization.

1379687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9288.

The product of its digits is 63504, while the sum is 41.

The square root of 1379687 is about 1174.6007832451. The cubic root of 1379687 is about 111.3252102631.

The spelling of 1379687 in words is "one million, three hundred seventy-nine thousand, six hundred eighty-seven".