258133949 has 2 divisors, whose sum is σ = 258133950. Its totient is φ = 258133948.

The previous prime is 258133907. The next prime is 258133999. The reversal of 258133949 is 949331852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200647225 + 57486724 = 14165^2 + 7582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258133949 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 (258133999) 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, 129066974 + 129066975.

It is an arithmetic number, because the mean of its divisors is an integer number (129066975).

Almost surely, 2^258133949 is an apocalyptic number.

It is an amenable number.

258133949 is a deficient number, since it is larger than the sum of its proper divisors (1).

258133949 is an equidigital number, since it uses as much as digits as its factorization.

258133949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 258133949 is about 16066.5475133894. The cubic root of 258133949 is about 636.7198291118.

The spelling of 258133949 in words is "two hundred fifty-eight million, one hundred thirty-three thousand, nine hundred forty-nine".