1650199797 has 10 divisors (see below), whose sum is σ = 2465113398. Its totient is φ = 1100133144.

The previous prime is 1650199787. The next prime is 1650199801. The reversal of 1650199797 is 7979910561.

1650199797 = 2484² + 2485² + ... + 2726².

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1648278801 + 1920996 = 40599^2 + 1386^2 .

It is not a de Polignac number, because 1650199797 - 2¹⁶ = 1650134261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650199717) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10186338 + ... + 10186499.

Almost surely, 2^1650199797 is an apocalyptic number.

It is an amenable number.

1650199797 is a deficient number, since it is larger than the sum of its proper divisors (814913601).

1650199797 is an equidigital number, since it uses as much as digits as its factorization.

1650199797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20372849 (or 20372840 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 54.

The square root of 1650199797 is about 40622.6512797971. The cubic root of 1650199797 is about 1181.7134441530.

The spelling of 1650199797 in words is "one billion, six hundred fifty million, one hundred ninety-nine thousand, seven hundred ninety-seven".