258161693 has 2 divisors, whose sum is σ = 258161694. Its totient is φ = 258161692.

The previous prime is 258161689. The next prime is 258161713. The reversal of 258161693 is 396161852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147428164 + 110733529 = 12142^2 + 10523^2 .

It is a cyclic number.

It is not a de Polignac number, because 258161693 - 2² = 258161689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 258161693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258161633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129080846 + 129080847.

It is an arithmetic number, because the mean of its divisors is an integer number (129080847).

Almost surely, 2^258161693 is an apocalyptic number.

It is an amenable number.

258161693 is a deficient number, since it is larger than the sum of its proper divisors (1).

258161693 is an equidigital number, since it uses as much as digits as its factorization.

258161693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 258161693 is about 16067.4108990839. The cubic root of 258161693 is about 636.7426396490.

The spelling of 258161693 in words is "two hundred fifty-eight million, one hundred sixty-one thousand, six hundred ninety-three".