1612905493 has 2 divisors, whose sum is σ = 1612905494. Its totient is φ = 1612905492.

The previous prime is 1612905491. The next prime is 1612905559. The reversal of 1612905493 is 3945092161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1596961444 + 15944049 = 39962^2 + 3993^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612905493 - 2¹ = 1612905491 is a prime.

Together with 1612905491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612905491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806452746 + 806452747.

It is an arithmetic number, because the mean of its divisors is an integer number (806452747).

Almost surely, 2^1612905493 is an apocalyptic number.

It is an amenable number.

1612905493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612905493 is an equidigital number, since it uses as much as digits as its factorization.

1612905493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1612905493 is about 40160.9946714471. The cubic root of 1612905493 is about 1172.7433356414.

The spelling of 1612905493 in words is "one billion, six hundred twelve million, nine hundred five thousand, four hundred ninety-three".