2131669747 has 2 divisors, whose sum is σ = 2131669748. Its totient is φ = 2131669746.

The previous prime is 2131669733. The next prime is 2131669777. The reversal of 2131669747 is 7479661312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131669747 - 2⁷ = 2131669619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131669697 and 2131669706.

It is not a weakly prime, because it can be changed into another prime (2131669777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065834873 + 1065834874.

It is an arithmetic number, because the mean of its divisors is an integer number (1065834874).

Almost surely, 2^2131669747 is an apocalyptic number.

2131669747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131669747 is an equidigital number, since it uses as much as digits as its factorization.

2131669747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 2131669747 is about 46170.0091726220. The cubic root of 2131669747 is about 1286.9844726767.

The spelling of 2131669747 in words is "two billion, one hundred thirty-one million, six hundred sixty-nine thousand, seven hundred forty-seven".