388998293 has 2 divisors, whose sum is σ = 388998294. Its totient is φ = 388998292.

The previous prime is 388998223. The next prime is 388998329. The reversal of 388998293 is 392899883.

Together with next prime (388998329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274465489 + 114532804 = 16567^2 + 10702^2 .

It is a cyclic number.

It is not a de Polignac number, because 388998293 - 2²⁶ = 321889429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388998223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194499146 + 194499147.

It is an arithmetic number, because the mean of its divisors is an integer number (194499147).

Almost surely, 2^388998293 is an apocalyptic number.

It is an amenable number.

388998293 is a deficient number, since it is larger than the sum of its proper divisors (1).

388998293 is an equidigital number, since it uses as much as digits as its factorization.

388998293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 59.

The square root of 388998293 is about 19723.0396491007. The cubic root of 388998293 is about 729.9882984301.

The spelling of 388998293 in words is "three hundred eighty-eight million, nine hundred ninety-eight thousand, two hundred ninety-three".