1690105525 has 6 divisors (see below), whose sum is σ = 2095730882. Its totient is φ = 1352084400.

The previous prime is 1690105489. The next prime is 1690105531. The reversal of 1690105525 is 5255010961.

It can be written as a sum of positive squares in 3 ways, for example, as 19421649 + 1670683876 = 4407^2 + 40874^2 .

It is not a de Polignac number, because 1690105525 - 2⁷ = 1690105397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33802086 + ... + 33802135.

Almost surely, 2^1690105525 is an apocalyptic number.

It is an amenable number.

1690105525 is a deficient number, since it is larger than the sum of its proper divisors (405625357).

1690105525 is an equidigital number, since it uses as much as digits as its factorization.

1690105525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67604231 (or 67604226 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 1690105525 is about 41110.8930211933. The cubic root of 1690105525 is about 1191.1632165704.

The spelling of 1690105525 in words is "one billion, six hundred ninety million, one hundred five thousand, five hundred twenty-five".