258629989 has 2 divisors, whose sum is σ = 258629990. Its totient is φ = 258629988.

The previous prime is 258629977. The next prime is 258629999. The reversal of 258629989 is 989926852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184497889 + 74132100 = 13583^2 + 8610^2 .

It is a cyclic number.

It is not a de Polignac number, because 258629989 - 2²⁷ = 124412261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258629939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129314994 + 129314995.

It is an arithmetic number, because the mean of its divisors is an integer number (129314995).

Almost surely, 2^258629989 is an apocalyptic number.

It is an amenable number.

258629989 is a deficient number, since it is larger than the sum of its proper divisors (1).

258629989 is an equidigital number, since it uses as much as digits as its factorization.

258629989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 58.

The square root of 258629989 is about 16081.9771483484. The cubic root of 258629989 is about 637.1274164799.

The spelling of 258629989 in words is "two hundred fifty-eight million, six hundred twenty-nine thousand, nine hundred eighty-nine".