650987 has 2 divisors, whose sum is σ = 650988. Its totient is φ = 650986.

The previous prime is 650971. The next prime is 651017. The reversal of 650987 is 789056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 650987 - 2⁴ = 650971 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 650987.

It is not a weakly prime, because it can be changed into another prime (650917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325493 + 325494.

It is an arithmetic number, because the mean of its divisors is an integer number (325494).

2⁶⁵⁰⁹⁸⁷ is an apocalyptic number.

650987 is a deficient number, since it is larger than the sum of its proper divisors (1).

650987 is an equidigital number, since it uses as much as digits as its factorization.

650987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 650987 is about 806.8376540544. The cubic root of 650987 is about 86.6677333859.

The spelling of 650987 in words is "six hundred fifty thousand, nine hundred eighty-seven".