1650307493 has 2 divisors, whose sum is σ = 1650307494. Its totient is φ = 1650307492.

The previous prime is 1650307459. The next prime is 1650307511. The reversal of 1650307493 is 3947030561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868657729 + 781649764 = 29473^2 + 27958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650307493 - 2¹² = 1650303397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1650307403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825153746 + 825153747.

It is an arithmetic number, because the mean of its divisors is an integer number (825153747).

Almost surely, 2^1650307493 is an apocalyptic number.

It is an amenable number.

1650307493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650307493 is an equidigital number, since it uses as much as digits as its factorization.

1650307493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 1650307493 is about 40623.9768240383. The cubic root of 1650307493 is about 1181.7391507458.

The spelling of 1650307493 in words is "one billion, six hundred fifty million, three hundred seven thousand, four hundred ninety-three".