1650704009 has 4 divisors (see below), whose sum is σ = 1650847440. Its totient is φ = 1650560580.

The previous prime is 1650703979. The next prime is 1650704017. The reversal of 1650704009 is 9004070561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9004070561 = 421 ⋅21387341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650704009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650704609) 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, 52787 + ... + 78024.

It is an arithmetic number, because the mean of its divisors is an integer number (412711860).

Almost surely, 2^1650704009 is an apocalyptic number.

It is an amenable number.

1650704009 is a deficient number, since it is larger than the sum of its proper divisors (143431).

1650704009 is a wasteful number, since it uses less digits than its factorization.

1650704009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143430.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1650704009 is about 40628.8568507656. The cubic root of 1650704009 is about 1181.8337878483.

The spelling of 1650704009 in words is "one billion, six hundred fifty million, seven hundred four thousand, nine".