388469997 has 6 divisors (see below), whose sum is σ = 561123342. Its totient is φ = 258979992.

The previous prime is 388469989. The next prime is 388470031. The reversal of 388469997 is 799964883.

388469997 is a `hidden beast` number, since 3 + 88 + 469 + 9 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 325838601 + 62631396 = 18051^2 + 7914^2 .

It is not a de Polignac number, because 388469997 - 2³ = 388469989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388469197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21581658 + ... + 21581675.

It is an arithmetic number, because the mean of its divisors is an integer number (93520557).

Almost surely, 2^388469997 is an apocalyptic number.

It is an amenable number.

388469997 is a deficient number, since it is larger than the sum of its proper divisors (172653345).

388469997 is a wasteful number, since it uses less digits than its factorization.

388469997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43163339 (or 43163336 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 388469997 is about 19709.6422341959. The cubic root of 388469997 is about 729.6576846290.

The spelling of 388469997 in words is "three hundred eighty-eight million, four hundred sixty-nine thousand, nine hundred ninety-seven".