258604823 has 2 divisors, whose sum is σ = 258604824. Its totient is φ = 258604822.

The previous prime is 258604807. The next prime is 258604859. The reversal of 258604823 is 328406852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258604823 - 2⁴ = 258604807 is a prime.

It is a super-2 number, since 2×258604823² = 133752908957722658, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129302411 + 129302412.

It is an arithmetic number, because the mean of its divisors is an integer number (129302412).

Almost surely, 2^258604823 is an apocalyptic number.

258604823 is a deficient number, since it is larger than the sum of its proper divisors (1).

258604823 is an equidigital number, since it uses as much as digits as its factorization.

258604823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 258604823 is about 16081.1947006434. The cubic root of 258604823 is about 637.1067505745.

The spelling of 258604823 in words is "two hundred fifty-eight million, six hundred four thousand, eight hundred twenty-three".