1690772161 has 9 divisors (see below), whose sum is σ = 1831415139. Its totient is φ = 1560219336.

The previous prime is 1690772143. The next prime is 1690772173. The reversal of 1690772161 is 1612770961.

The square root of 1690772161 is 41119.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 250114225 + 1440657936 = 15815^2 + 37956^2 .

It is not a de Polignac number, because 1690772161 - 2⁵ = 1690772129 is a prime.

It is a super-3 number, since 3×1690772161³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690772101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 532966 + ... + 536128.

It is an arithmetic number, because the mean of its divisors is an integer number (203490571).

Almost surely, 2^1690772161 is an apocalyptic number.

1690772161 is the 41119-th square number.

1690772161 is the 20560-th centered octagonal number.

It is an amenable number.

1690772161 is a deficient number, since it is larger than the sum of its proper divisors (140642978).

1690772161 is an frugal number, since it uses more digits than its factorization.

1690772161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352 (or 3176 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The cubic root of 1690772161 is about 1191.3198079568.

The spelling of 1690772161 in words is "one billion, six hundred ninety million, seven hundred seventy-two thousand, one hundred sixty-one".