1690050641 has 2 divisors, whose sum is σ = 1690050642. Its totient is φ = 1690050640.

The previous prime is 1690050623. The next prime is 1690050647. The reversal of 1690050641 is 1460500961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888934225 + 801116416 = 29815^2 + 28304^2 .

It is an emirp because it is prime and its reverse (1460500961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690050641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1690050598 and 1690050607.

It is not a weakly prime, because it can be changed into another prime (1690050647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845025320 + 845025321.

It is an arithmetic number, because the mean of its divisors is an integer number (845025321).

Almost surely, 2^1690050641 is an apocalyptic number.

It is an amenable number.

1690050641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690050641 is an equidigital number, since it uses as much as digits as its factorization.

1690050641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1690050641 is about 41110.2255041249. The cubic root of 1690050641 is about 1191.1503226005.

The spelling of 1690050641 in words is "one billion, six hundred ninety million, fifty thousand, six hundred forty-one".