658349779 has 2 divisors, whose sum is σ = 658349780. Its totient is φ = 658349778.

The previous prime is 658349777. The next prime is 658349891. The reversal of 658349779 is 977943856.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 658349779 - 2¹ = 658349777 is a prime.

Together with 658349777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (658349771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329174889 + 329174890.

It is an arithmetic number, because the mean of its divisors is an integer number (329174890).

Almost surely, 2^658349779 is an apocalyptic number.

658349779 is a deficient number, since it is larger than the sum of its proper divisors (1).

658349779 is an equidigital number, since it uses as much as digits as its factorization.

658349779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 58.

The square root of 658349779 is about 25658.3276734864. The cubic root of 658349779 is about 869.9325173359.

The spelling of 658349779 in words is "six hundred fifty-eight million, three hundred forty-nine thousand, seven hundred seventy-nine".