65042987 has 2 divisors, whose sum is σ = 65042988. Its totient is φ = 65042986.

The previous prime is 65042977. The next prime is 65043001. The reversal of 65042987 is 78924056.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65042987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65042917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32521493 + 32521494.

It is an arithmetic number, because the mean of its divisors is an integer number (32521494).

Almost surely, 2^65042987 is an apocalyptic number.

65042987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65042987 is an equidigital number, since it uses as much as digits as its factorization.

65042987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 65042987 is about 8064.9232482399. The cubic root of 65042987 is about 402.1611916797.

It can be divided in two parts, 650 and 42987, that multiplied together give a triangular number (27941550 = T₇₄₇₅).

The spelling of 65042987 in words is "sixty-five million, forty-two thousand, nine hundred eighty-seven".