258349779 has 12 divisors (see below), whose sum is σ = 373343256. Its totient is φ = 172154112.

The previous prime is 258349739. The next prime is 258349781. The reversal of 258349779 is 977943852.

258349779 is a `hidden beast` number, since 2 + 5 + 83 + 497 + 79 = 666.

It is not a de Polignac number, because 258349779 - 2⁸ = 258349523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258349739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19564 + ... + 29990.

It is an arithmetic number, because the mean of its divisors is an integer number (31111938).

Almost surely, 2^258349779 is an apocalyptic number.

258349779 is a deficient number, since it is larger than the sum of its proper divisors (114993477).

258349779 is a wasteful number, since it uses less digits than its factorization.

258349779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186 (or 13183 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 258349779 is about 16073.2628610373. The cubic root of 258349779 is about 636.8972369505.

The spelling of 258349779 in words is "two hundred fifty-eight million, three hundred forty-nine thousand, seven hundred seventy-nine".