388403 has 2 divisors, whose sum is σ = 388404. Its totient is φ = 388402.

The previous prime is 388391. The next prime is 388459. The reversal of 388403 is 304883.

It is a weak prime.

It is an emirp because it is prime and its reverse (304883) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194201 + 194202.

It is an arithmetic number, because the mean of its divisors is an integer number (194202).

2³⁸⁸⁴⁰³ is an apocalyptic number.

388403 is a deficient number, since it is larger than the sum of its proper divisors (1).

388403 is an equidigital number, since it uses as much as digits as its factorization.

388403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 388403 is about 623.2198648952. The cubic root of 388403 is about 72.9615735712.

The spelling of 388403 in words is "three hundred eighty-eight thousand, four hundred three".