1613289085 has 4 divisors (see below), whose sum is σ = 1935946908. Its totient is φ = 1290631264.

The previous prime is 1613289079. The next prime is 1613289089. The reversal of 1613289085 is 5809823161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183087961 + 1430201124 = 13531^2 + 37818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613289085 - 2²⁹ = 1076418173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613289089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161328904 + ... + 161328913.

It is an arithmetic number, because the mean of its divisors is an integer number (483986727).

Almost surely, 2^1613289085 is an apocalyptic number.

It is an amenable number.

1613289085 is a deficient number, since it is larger than the sum of its proper divisors (322657823).

1613289085 is an equidigital number, since it uses as much as digits as its factorization.

1613289085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322657822.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1613289085 is about 40165.7700660650. The cubic root of 1613289085 is about 1172.8362981668.

The spelling of 1613289085 in words is "one billion, six hundred thirteen million, two hundred eighty-nine thousand, eighty-five".