388870429 has 2 divisors, whose sum is σ = 388870430. Its totient is φ = 388870428.

The previous prime is 388870411. The next prime is 388870441. The reversal of 388870429 is 924078883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281333529 + 107536900 = 16773^2 + 10370^2 .

It is a cyclic number.

It is not a de Polignac number, because 388870429 - 2¹⁹ = 388346141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388870409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194435214 + 194435215.

It is an arithmetic number, because the mean of its divisors is an integer number (194435215).

Almost surely, 2^388870429 is an apocalyptic number.

It is an amenable number.

388870429 is a deficient number, since it is larger than the sum of its proper divisors (1).

388870429 is an equidigital number, since it uses as much as digits as its factorization.

388870429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 388870429 is about 19719.7978945019. The cubic root of 388870429 is about 729.9083071171.

The spelling of 388870429 in words is "three hundred eighty-eight million, eight hundred seventy thousand, four hundred twenty-nine".