1613969009 has 4 divisors (see below), whose sum is σ = 1651503216. Its totient is φ = 1576434804.

The previous prime is 1613968981. The next prime is 1613969033. The reversal of 1613969009 is 9009693161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613969009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613969039) 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, 18767039 + ... + 18767124.

It is an arithmetic number, because the mean of its divisors is an integer number (412875804).

Almost surely, 2^1613969009 is an apocalyptic number.

It is an amenable number.

1613969009 is a deficient number, since it is larger than the sum of its proper divisors (37534207).

1613969009 is an equidigital number, since it uses as much as digits as its factorization.

1613969009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37534206.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 1613969009 is about 40174.2331476283. The cubic root of 1613969009 is about 1173.0010397814.

The spelling of 1613969009 in words is "one billion, six hundred thirteen million, nine hundred sixty-nine thousand, nine".