2053731661 has 2 divisors, whose sum is σ = 2053731662. Its totient is φ = 2053731660.

The previous prime is 2053731653. The next prime is 2053731689. The reversal of 2053731661 is 1661373502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1793522500 + 260209161 = 42350^2 + 16131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053731661 - 2³ = 2053731653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053731611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026865830 + 1026865831.

It is an arithmetic number, because the mean of its divisors is an integer number (1026865831).

Almost surely, 2^2053731661 is an apocalyptic number.

It is an amenable number.

2053731661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053731661 is an equidigital number, since it uses as much as digits as its factorization.

2053731661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 2053731661 is about 45318.1162560846. The cubic root of 2053731661 is about 1271.1044314245.

The spelling of 2053731661 in words is "two billion, fifty-three million, seven hundred thirty-one thousand, six hundred sixty-one".