258620749 has 2 divisors, whose sum is σ = 258620750. Its totient is φ = 258620748.

The previous prime is 258620741. The next prime is 258620767. The reversal of 258620749 is 947026852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241958025 + 16662724 = 15555^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 258620749 - 2³ = 258620741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258620741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129310374 + 129310375.

It is an arithmetic number, because the mean of its divisors is an integer number (129310375).

Almost surely, 2^258620749 is an apocalyptic number.

It is an amenable number.

258620749 is a deficient number, since it is larger than the sum of its proper divisors (1).

258620749 is an equidigital number, since it uses as much as digits as its factorization.

258620749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 258620749 is about 16081.6898676725. The cubic root of 258620749 is about 637.1198288996.

The spelling of 258620749 in words is "two hundred fifty-eight million, six hundred twenty thousand, seven hundred forty-nine".