1690319184121 has 2 divisors, whose sum is σ = 1690319184122. Its totient is φ = 1690319184120.

The previous prime is 1690319184107. The next prime is 1690319184161. The reversal of 1690319184121 is 1214819130961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1662645198096 + 27673986025 = 1289436^2 + 166355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690319184121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690319184161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845159592060 + 845159592061.

It is an arithmetic number, because the mean of its divisors is an integer number (845159592061).

Almost surely, 2^{1690319184121} is an apocalyptic number.

It is an amenable number.

1690319184121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690319184121 is an equidigital number, since it uses as much as digits as its factorization.

1690319184121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 1690319184121 in words is "one trillion, six hundred ninety billion, three hundred nineteen million, one hundred eighty-four thousand, one hundred twenty-one".