1965953971 has 2 divisors, whose sum is σ = 1965953972. Its totient is φ = 1965953970.

The previous prime is 1965953909. The next prime is 1965953987. The reversal of 1965953971 is 1793595691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1965953971 - 2²⁹ = 1429083059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1965953371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982976985 + 982976986.

It is an arithmetic number, because the mean of its divisors is an integer number (982976986).

Almost surely, 2^1965953971 is an apocalyptic number.

1965953971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965953971 is an equidigital number, since it uses as much as digits as its factorization.

1965953971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2296350, while the sum is 55.

The square root of 1965953971 is about 44339.0795010451. The cubic root of 1965953971 is about 1252.7308766521.

The spelling of 1965953971 in words is "one billion, nine hundred sixty-five million, nine hundred fifty-three thousand, nine hundred seventy-one".