2131897919 has 2 divisors, whose sum is σ = 2131897920. Its totient is φ = 2131897918.

The previous prime is 2131897897. The next prime is 2131897921. The reversal of 2131897919 is 9197981312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131897919 - 2²⁴ = 2115120703 is a prime.

It is a super-2 number, since 2×2131897919² = 9089977474073061122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2131897921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131897939) 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, 1065948959 + 1065948960.

It is an arithmetic number, because the mean of its divisors is an integer number (1065948960).

Almost surely, 2^2131897919 is an apocalyptic number.

2131897919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131897919 is an equidigital number, since it uses as much as digits as its factorization.

2131897919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 50.

The square root of 2131897919 is about 46172.4801044951. The cubic root of 2131897919 is about 1287.0303902561.

The spelling of 2131897919 in words is "two billion, one hundred thirty-one million, eight hundred ninety-seven thousand, nine hundred nineteen".