1929650689 has 2 divisors, whose sum is σ = 1929650690. Its totient is φ = 1929650688.

The previous prime is 1929650647. The next prime is 1929650693. The reversal of 1929650689 is 9860569291.

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., 992250000 + 937400689 = 31500^2 + 30617^2 .

It is an emirp because it is prime and its reverse (9860569291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1929650689 - 2¹⁷ = 1929519617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1929654689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964825344 + 964825345.

It is an arithmetic number, because the mean of its divisors is an integer number (964825345).

Almost surely, 2^1929650689 is an apocalyptic number.

It is an amenable number.

1929650689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1929650689 is an equidigital number, since it uses as much as digits as its factorization.

1929650689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 1929650689 is about 43927.7894845620. The cubic root of 1929650689 is about 1244.9719490677.

The spelling of 1929650689 in words is "one billion, nine hundred twenty-nine million, six hundred fifty thousand, six hundred eighty-nine".