65105987 has 2 divisors, whose sum is σ = 65105988. Its totient is φ = 65105986.

The previous prime is 65105981. The next prime is 65106001. The reversal of 65105987 is 78950156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65105987 - 2⁶ = 65105923 is a prime.

It is not a weakly prime, because it can be changed into another prime (65105981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32552993 + 32552994.

It is an arithmetic number, because the mean of its divisors is an integer number (32552994).

Almost surely, 2^65105987 is an apocalyptic number.

65105987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65105987 is an equidigital number, since it uses as much as digits as its factorization.

65105987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 65105987 is about 8068.8281057413. The cubic root of 65105987 is about 402.2909929108.

The spelling of 65105987 in words is "sixty-five million, one hundred five thousand, nine hundred eighty-seven".