1690395793 has 2 divisors, whose sum is σ = 1690395794. Its totient is φ = 1690395792.

The previous prime is 1690395769. The next prime is 1690395829. The reversal of 1690395793 is 3975930961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1506060864 + 184334929 = 38808^2 + 13577^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690395793 - 2¹⁷ = 1690264721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1690395793.

It is not a weakly prime, because it can be changed into another prime (1690395593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845197896 + 845197897.

It is an arithmetic number, because the mean of its divisors is an integer number (845197897).

Almost surely, 2^1690395793 is an apocalyptic number.

It is an amenable number.

1690395793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690395793 is an equidigital number, since it uses as much as digits as its factorization.

1690395793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1377810, while the sum is 52.

The square root of 1690395793 is about 41114.4231748422. The cubic root of 1690395793 is about 1191.2314049700.

The spelling of 1690395793 in words is "one billion, six hundred ninety million, three hundred ninety-five thousand, seven hundred ninety-three".