388542697 has 4 divisors (see below), whose sum is σ = 390239620. Its totient is φ = 386845776.

The previous prime is 388542689. The next prime is 388542731. The reversal of 388542697 is 796245883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796245883 = 37 ⋅21520159.

It can be written as a sum of positive squares in 2 ways, for example, as 273538521 + 115004176 = 16539^2 + 10724^2 .

It is a cyclic number.

It is not a de Polignac number, because 388542697 - 2³ = 388542689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388542607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848118 + ... + 848575.

It is an arithmetic number, because the mean of its divisors is an integer number (97559905).

Almost surely, 2^388542697 is an apocalyptic number.

It is an amenable number.

388542697 is a deficient number, since it is larger than the sum of its proper divisors (1696923).

388542697 is a wasteful number, since it uses less digits than its factorization.

388542697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696922.

The product of its digits is 2903040, while the sum is 52.

The square root of 388542697 is about 19711.4864228957. The cubic root of 388542697 is about 729.7031989161.

The spelling of 388542697 in words is "three hundred eighty-eight million, five hundred forty-two thousand, six hundred ninety-seven".