1612779913 has 2 divisors, whose sum is σ = 1612779914. Its totient is φ = 1612779912.

The previous prime is 1612779911. The next prime is 1612779923. The reversal of 1612779913 is 3199772161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1558433529 + 54346384 = 39477^2 + 7372^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612779913 - 2¹ = 1612779911 is a prime.

Together with 1612779911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1612779911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806389956 + 806389957.

It is an arithmetic number, because the mean of its divisors is an integer number (806389957).

Almost surely, 2^1612779913 is an apocalyptic number.

It is an amenable number.

1612779913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612779913 is an equidigital number, since it uses as much as digits as its factorization.

1612779913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 46.

The square root of 1612779913 is about 40159.4311837207. The cubic root of 1612779913 is about 1172.7128984519.

The spelling of 1612779913 in words is "one billion, six hundred twelve million, seven hundred seventy-nine thousand, nine hundred thirteen".