258331387 has 2 divisors, whose sum is σ = 258331388. Its totient is φ = 258331386.

The previous prime is 258331379. The next prime is 258331427. The reversal of 258331387 is 783133852.

It is an a-pointer prime, because the next prime (258331427) can be obtained adding 258331387 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258331387 - 2³ = 258331379 is a prime.

It is not a weakly prime, because it can be changed into another prime (258332387) 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, 129165693 + 129165694.

It is an arithmetic number, because the mean of its divisors is an integer number (129165694).

Almost surely, 2^258331387 is an apocalyptic number.

258331387 is a deficient number, since it is larger than the sum of its proper divisors (1).

258331387 is an equidigital number, since it uses as much as digits as its factorization.

258331387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 258331387 is about 16072.6907205981. The cubic root of 258331387 is about 636.8821229553.

The spelling of 258331387 in words is "two hundred fifty-eight million, three hundred thirty-one thousand, three hundred eighty-seven".