258001987 has 4 divisors (see below), whose sum is σ = 258065136. Its totient is φ = 257938840.

The previous prime is 258001981. The next prime is 258002033. The reversal of 258001987 is 789100852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258001987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258001981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24988 + ... + 33769.

It is an arithmetic number, because the mean of its divisors is an integer number (64516284).

Almost surely, 2^258001987 is an apocalyptic number.

258001987 is a deficient number, since it is larger than the sum of its proper divisors (63149).

258001987 is an equidigital number, since it uses as much as digits as its factorization.

258001987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63148.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 258001987 is about 16062.4402566982. The cubic root of 258001987 is about 636.6113103313.

The spelling of 258001987 in words is "two hundred fifty-eight million, one thousand, nine hundred eighty-seven".