388693 has 2 divisors, whose sum is σ = 388694. Its totient is φ = 388692.

The previous prime is 388691. The next prime is 388697. The reversal of 388693 is 396883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 178929 = 458^2 + 423^2 .

It is an emirp because it is prime and its reverse (396883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388693 - 2¹ = 388691 is a prime.

Together with 388691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194346 + 194347.

It is an arithmetic number, because the mean of its divisors is an integer number (194347).

2³⁸⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

388693 is a deficient number, since it is larger than the sum of its proper divisors (1).

388693 is an equidigital number, since it uses as much as digits as its factorization.

388693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 388693 is about 623.4524841558. The cubic root of 388693 is about 72.9797279045.

It can be divided in two parts, 388 and 693, that added together give a triangular number (1081 = T₄₆).

The spelling of 388693 in words is "three hundred eighty-eight thousand, six hundred ninety-three".