1690627273 has 4 divisors (see below), whose sum is σ = 1736319940. Its totient is φ = 1644934608.

The previous prime is 1690627247. The next prime is 1690627303. The reversal of 1690627273 is 3727260961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3727260961 = 25453 ⋅146437.

It can be written as a sum of positive squares in 2 ways, for example, as 1137577984 + 553049289 = 33728^2 + 23517^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690627273 - 2¹³ = 1690619081 is a prime.

It is a super-2 number, since 2×1690627273² = 5716441152422833058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690627223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22846278 + ... + 22846351.

It is an arithmetic number, because the mean of its divisors is an integer number (434079985).

Almost surely, 2^1690627273 is an apocalyptic number.

It is an amenable number.

1690627273 is a deficient number, since it is larger than the sum of its proper divisors (45692667).

1690627273 is an equidigital number, since it uses as much as digits as its factorization.

1690627273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45692666.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 1690627273 is about 41117.2381489808. The cubic root of 1690627273 is about 1191.2857775733.

The spelling of 1690627273 in words is "one billion, six hundred ninety million, six hundred twenty-seven thousand, two hundred seventy-three".