388681253 has 2 divisors, whose sum is σ = 388681254. Its totient is φ = 388681252.

The previous prime is 388681219. The next prime is 388681333. The reversal of 388681253 is 352186883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224790049 + 163891204 = 14993^2 + 12802^2 .

It is a cyclic number.

It is not a de Polignac number, because 388681253 - 2²⁴ = 371904037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388681453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194340626 + 194340627.

It is an arithmetic number, because the mean of its divisors is an integer number (194340627).

Almost surely, 2^388681253 is an apocalyptic number.

It is an amenable number.

388681253 is a deficient number, since it is larger than the sum of its proper divisors (1).

388681253 is an equidigital number, since it uses as much as digits as its factorization.

388681253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 388681253 is about 19715.0007101192. Note that the first 3 decimals coincide. The cubic root of 388681253 is about 729.7899270427.

The spelling of 388681253 in words is "three hundred eighty-eight million, six hundred eighty-one thousand, two hundred fifty-three".