2690393161 has 3 divisors (see below), whose sum is σ = 2690445031. Its totient is φ = 2690341292.

The previous prime is 2690393159. The next prime is 2690393177. The reversal of 2690393161 is 1613930962.

The square root of 2690393161 is 51869.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 326488761 + 2363904400 = 18069^2 + 48620^2 .

It is not a de Polignac number, because 2690393161 - 2¹ = 2690393159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2690399161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25935 + ... + 77803.

Almost surely, 2^2690393161 is an apocalyptic number.

2690393161 is the 51869-th square number.

2690393161 is the 25935-th centered octagonal number.

It is an amenable number.

2690393161 is a deficient number, since it is larger than the sum of its proper divisors (51870).

2690393161 is an frugal number, since it uses more digits than its factorization.

2690393161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103738 (or 51869 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The cubic root of 2690393161 is about 1390.8231690595.

The spelling of 2690393161 in words is "two billion, six hundred ninety million, three hundred ninety-three thousand, one hundred sixty-one".