1438687 has 2 divisors, whose sum is σ = 1438688. Its totient is φ = 1438686.

The previous prime is 1438681. The next prime is 1438709. The reversal of 1438687 is 7868341.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1438687 - 2¹¹ = 1436639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719343 + 719344.

It is an arithmetic number, because the mean of its divisors is an integer number (719344).

2^1438687 is an apocalyptic number.

1438687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438687 is an equidigital number, since it uses as much as digits as its factorization.

1438687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 1438687 is about 1199.4527919014. The cubic root of 1438687 is about 112.8899913537.

The spelling of 1438687 in words is "one million, four hundred thirty-eight thousand, six hundred eighty-seven".