389998253 has 2 divisors, whose sum is σ = 389998254. Its totient is φ = 389998252.

The previous prime is 389998249. The next prime is 389998289. The reversal of 389998253 is 352899983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266277124 + 123721129 = 16318^2 + 11123^2 .

It is a cyclic number.

It is not a de Polignac number, because 389998253 - 2² = 389998249 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 (389998153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194999126 + 194999127.

It is an arithmetic number, because the mean of its divisors is an integer number (194999127).

Almost surely, 2^389998253 is an apocalyptic number.

It is an amenable number.

389998253 is a deficient number, since it is larger than the sum of its proper divisors (1).

389998253 is an equidigital number, since it uses as much as digits as its factorization.

389998253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 56.

The square root of 389998253 is about 19748.3734266901. The cubic root of 389998253 is about 730.6132664788.

The spelling of 389998253 in words is "three hundred eighty-nine million, nine hundred ninety-eight thousand, two hundred fifty-three".