1690085225 has 12 divisors (see below), whose sum is σ = 2096217024. Its totient is φ = 1351738320.

The previous prime is 1690085219. The next prime is 1690085227. The reversal of 1690085225 is 5225800961.

It is not a de Polignac number, because 1690085225 - 2⁶ = 1690085161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690085227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185732 + ... + 194618.

It is an arithmetic number, because the mean of its divisors is an integer number (174684752).

Almost surely, 2^1690085225 is an apocalyptic number.

It is an amenable number.

1690085225 is a deficient number, since it is larger than the sum of its proper divisors (406131799).

1690085225 is an equidigital number, since it uses as much as digits as its factorization.

1690085225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16504 (or 16499 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1690085225 is about 41110.6461272503. The cubic root of 1690085225 is about 1191.1584474974.

The spelling of 1690085225 in words is "one billion, six hundred ninety million, eighty-five thousand, two hundred twenty-five".