258787 has 2 divisors, whose sum is σ = 258788. Its totient is φ = 258786.

The previous prime is 258779. The next prime is 258803. The reversal of 258787 is 787852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258787 - 2³ = 258779 is a prime.

It is a super-2 number, since 2×258787² = 133941422738, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 5⁷ + 7 + 8 + 8⁵ + 7⁵ .

It is an alternating number because its digits alternate between even and odd.

258787 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (258707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129393 + 129394.

It is an arithmetic number, because the mean of its divisors is an integer number (129394).

2²⁵⁸⁷⁸⁷ is an apocalyptic number.

258787 is a deficient number, since it is larger than the sum of its proper divisors (1).

258787 is an equidigital number, since it uses as much as digits as its factorization.

258787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 37.

The square root of 258787 is about 508.7111164502. The cubic root of 258787 is about 63.7256321067.

The spelling of 258787 in words is "two hundred fifty-eight thousand, seven hundred eighty-seven".