1606387 has 2 divisors, whose sum is σ = 1606388. Its totient is φ = 1606386.

The previous prime is 1606379. The next prime is 1606399. The reversal of 1606387 is 7836061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1606387 - 2³ = 1606379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803193 + 803194.

It is an arithmetic number, because the mean of its divisors is an integer number (803194).

2^1606387 is an apocalyptic number.

1606387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606387 is an equidigital number, since it uses as much as digits as its factorization.

1606387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1606387 is about 1267.4332329555. The cubic root of 1606387 is about 117.1161337444.

The spelling of 1606387 in words is "one million, six hundred six thousand, three hundred eighty-seven".