1690331627 has 2 divisors, whose sum is σ = 1690331628. Its totient is φ = 1690331626.

The previous prime is 1690331581. The next prime is 1690331689. The reversal of 1690331627 is 7261330961.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1690331627 - 2¹⁴ = 1690315243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690333627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845165813 + 845165814.

It is an arithmetic number, because the mean of its divisors is an integer number (845165814).

Almost surely, 2^1690331627 is an apocalyptic number.

1690331627 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690331627 is an equidigital number, since it uses as much as digits as its factorization.

1690331627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 1690331627 is about 41113.6428330062. The cubic root of 1690331627 is about 1191.2163320658.

The spelling of 1690331627 in words is "one billion, six hundred ninety million, three hundred thirty-one thousand, six hundred twenty-seven".