1609896979 has 2 divisors, whose sum is σ = 1609896980. Its totient is φ = 1609896978.

The previous prime is 1609896887. The next prime is 1609897013. The reversal of 1609896979 is 9796989061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1609896979 - 2⁷ = 1609896851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1609896979.

It is not a weakly prime, because it can be changed into another prime (1609896779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804948489 + 804948490.

It is an arithmetic number, because the mean of its divisors is an integer number (804948490).

Almost surely, 2^1609896979 is an apocalyptic number.

1609896979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609896979 is an equidigital number, since it uses as much as digits as its factorization.

1609896979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 64.

The square root of 1609896979 is about 40123.5215179326. The cubic root of 1609896979 is about 1172.0137184519.

The spelling of 1609896979 in words is "one billion, six hundred nine million, eight hundred ninety-six thousand, nine hundred seventy-nine".