1658313779 has 2 divisors, whose sum is σ = 1658313780. Its totient is φ = 1658313778.

The previous prime is 1658313733. The next prime is 1658313829. The reversal of 1658313779 is 9773138561.

It is an a-pointer prime, because the next prime (1658313829) can be obtained adding 1658313779 to its sum of digits (50).

It is a weak prime.

It is an emirp because it is prime and its reverse (9773138561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1658313779 - 2¹⁶ = 1658248243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1658313719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829156889 + 829156890.

It is an arithmetic number, because the mean of its divisors is an integer number (829156890).

Almost surely, 2^1658313779 is an apocalyptic number.

1658313779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1658313779 is an equidigital number, since it uses as much as digits as its factorization.

1658313779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 50.

The square root of 1658313779 is about 40722.3989838516. The cubic root of 1658313779 is about 1183.6470946779.

The spelling of 1658313779 in words is "one billion, six hundred fifty-eight million, three hundred thirteen thousand, seven hundred seventy-nine".