1396687 has 2 divisors, whose sum is σ = 1396688. Its totient is φ = 1396686.

The previous prime is 1396679. The next prime is 1396691. The reversal of 1396687 is 7866931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1396687 - 2³ = 1396679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698343 + 698344.

It is an arithmetic number, because the mean of its divisors is an integer number (698344).

2^1396687 is an apocalyptic number.

1396687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396687 is an equidigital number, since it uses as much as digits as its factorization.

1396687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 1396687 is about 1181.8151293667. The cubic root of 1396687 is about 111.7805812602.

The spelling of 1396687 in words is "one million, three hundred ninety-six thousand, six hundred eighty-seven".