65187971 has 2 divisors, whose sum is σ = 65187972. Its totient is φ = 65187970.

The previous prime is 65187959. The next prime is 65187989. The reversal of 65187971 is 17978156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65187971 - 2⁶ = 65187907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65187371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32593985 + 32593986.

It is an arithmetic number, because the mean of its divisors is an integer number (32593986).

Almost surely, 2^65187971 is an apocalyptic number.

65187971 is a deficient number, since it is larger than the sum of its proper divisors (1).

65187971 is an equidigital number, since it uses as much as digits as its factorization.

65187971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 65187971 is about 8073.9067990657. The cubic root of 65187971 is about 402.4597822553.

The spelling of 65187971 in words is "sixty-five million, one hundred eighty-seven thousand, nine hundred seventy-one".