258047989 has 2 divisors, whose sum is σ = 258047990. Its totient is φ = 258047988.

The previous prime is 258047927. The next prime is 258048013. The reversal of 258047989 is 989740852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254147364 + 3900625 = 15942^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 258047989 - 2⁹ = 258047477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258041989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129023994 + 129023995.

It is an arithmetic number, because the mean of its divisors is an integer number (129023995).

Almost surely, 2^258047989 is an apocalyptic number.

It is an amenable number.

258047989 is a deficient number, since it is larger than the sum of its proper divisors (1).

258047989 is an equidigital number, since it uses as much as digits as its factorization.

258047989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 258047989 is about 16063.8721670711. The cubic root of 258047989 is about 636.6491442171.

The spelling of 258047989 in words is "two hundred fifty-eight million, forty-seven thousand, nine hundred eighty-nine".