1690227863 has 2 divisors, whose sum is σ = 1690227864. Its totient is φ = 1690227862.

The previous prime is 1690227809. The next prime is 1690227883. The reversal of 1690227863 is 3687220961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1690227863 - 2⁸ = 1690227607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690227883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845113931 + 845113932.

It is an arithmetic number, because the mean of its divisors is an integer number (845113932).

Almost surely, 2^1690227863 is an apocalyptic number.

1690227863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690227863 is an equidigital number, since it uses as much as digits as its factorization.

1690227863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1690227863 is about 41112.3808967566. The cubic root of 1690227863 is about 1191.1919565924.

The spelling of 1690227863 in words is "one billion, six hundred ninety million, two hundred twenty-seven thousand, eight hundred sixty-three".