65512987 has 2 divisors, whose sum is σ = 65512988. Its totient is φ = 65512986.

The previous prime is 65512981. The next prime is 65512991. The reversal of 65512987 is 78921556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65512987 is a prime.

It is not a weakly prime, because it can be changed into another prime (65512981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32756493 + 32756494.

It is an arithmetic number, because the mean of its divisors is an integer number (32756494).

Almost surely, 2^65512987 is an apocalyptic number.

65512987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65512987 is an equidigital number, since it uses as much as digits as its factorization.

65512987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 65512987 is about 8094.0093278918. The cubic root of 65512987 is about 403.1275387697.

The spelling of 65512987 in words is "sixty-five million, five hundred twelve thousand, nine hundred eighty-seven".