1338691 has 8 divisors (see below), whose sum is σ = 1389024. Its totient is φ = 1289280.

The previous prime is 1338679. The next prime is 1338703. The reversal of 1338691 is 1968331.

It is an interprime number because it is at equal distance from previous prime (1338679) and next prime (1338703).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1338691 - 2¹³ = 1330499 is a prime.

It is a Duffinian number.

1338691 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4065 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (173628).

2^1338691 is an apocalyptic number.

1338691 is a deficient number, since it is larger than the sum of its proper divisors (50333).

1338691 is a wasteful number, since it uses less digits than its factorization.

1338691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 3888, while the sum is 31.

The square root of 1338691 is about 1157.0181502466. The cubic root of 1338691 is about 110.2114664898.

The spelling of 1338691 in words is "one million, three hundred thirty-eight thousand, six hundred ninety-one".