258768773 has 2 divisors, whose sum is σ = 258768774. Its totient is φ = 258768772.

The previous prime is 258768761. The next prime is 258768779. The reversal of 258768773 is 377867852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150234049 + 108534724 = 12257^2 + 10418^2 .

It is a cyclic number.

It is not a de Polignac number, because 258768773 - 2²⁴ = 241991557 is a prime.

It is a super-2 number, since 2×258768773² = 133922555759851058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258768779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129384386 + 129384387.

It is an arithmetic number, because the mean of its divisors is an integer number (129384387).

Almost surely, 2^258768773 is an apocalyptic number.

It is an amenable number.

258768773 is a deficient number, since it is larger than the sum of its proper divisors (1).

258768773 is an equidigital number, since it uses as much as digits as its factorization.

258768773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 53.

The square root of 258768773 is about 16086.2914619871. The cubic root of 258768773 is about 637.2413595434.

The spelling of 258768773 in words is "two hundred fifty-eight million, seven hundred sixty-eight thousand, seven hundred seventy-three".