1612990809 has 6 divisors (see below), whose sum is σ = 2329875626. Its totient is φ = 1075327200.

The previous prime is 1612990781. The next prime is 1612990811. The reversal of 1612990809 is 9080992161.

It can be written as a sum of positive squares in only one way, i.e., 1001912409 + 611078400 = 31653^2 + 24720^2 .

It is not a de Polignac number, because 1612990809 - 2⁵ = 1612990777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612990859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89610592 + ... + 89610609.

Almost surely, 2^1612990809 is an apocalyptic number.

It is an amenable number.

1612990809 is a deficient number, since it is larger than the sum of its proper divisors (716884817).

1612990809 is a wasteful number, since it uses less digits than its factorization.

1612990809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179221207 (or 179221204 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1612990809 is about 40162.0568322889. The cubic root of 1612990809 is about 1172.7640130270.

The spelling of 1612990809 in words is "one billion, six hundred twelve million, nine hundred ninety thousand, eight hundred nine".