2131934869 has 2 divisors, whose sum is σ = 2131934870. Its totient is φ = 2131934868.

The previous prime is 2131934809. The next prime is 2131934887. The reversal of 2131934869 is 9684391312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1093161969 + 1038772900 = 33063^2 + 32230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131934869 is a prime.

It is a super-2 number, since 2×2131934869² = 9090292571316094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131934809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065967434 + 1065967435.

It is an arithmetic number, because the mean of its divisors is an integer number (1065967435).

Almost surely, 2^2131934869 is an apocalyptic number.

It is an amenable number.

2131934869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131934869 is an equidigital number, since it uses as much as digits as its factorization.

2131934869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 2131934869 is about 46172.8802328813. The cubic root of 2131934869 is about 1287.0378258057.

The spelling of 2131934869 in words is "two billion, one hundred thirty-one million, nine hundred thirty-four thousand, eight hundred sixty-nine".