388879399 has 2 divisors, whose sum is σ = 388879400. Its totient is φ = 388879398.

The previous prime is 388879343. The next prime is 388879411. The reversal of 388879399 is 993978883.

It is a strong prime.

It is an emirp because it is prime and its reverse (993978883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388879399 - 2⁹ = 388878887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388879399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388879999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194439699 + 194439700.

It is an arithmetic number, because the mean of its divisors is an integer number (194439700).

Almost surely, 2^388879399 is an apocalyptic number.

388879399 is a deficient number, since it is larger than the sum of its proper divisors (1).

388879399 is an equidigital number, since it uses as much as digits as its factorization.

388879399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 64.

The square root of 388879399 is about 19720.0253295983. The cubic root of 388879399 is about 729.9139192925.

The spelling of 388879399 in words is "three hundred eighty-eight million, eight hundred seventy-nine thousand, three hundred ninety-nine".