659377987 has 2 divisors, whose sum is σ = 659377988. Its totient is φ = 659377986.

The previous prime is 659377973. The next prime is 659377991. The reversal of 659377987 is 789773956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 659377987 - 2¹¹ = 659375939 is a prime.

It is not a weakly prime, because it can be changed into another prime (659377787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329688993 + 329688994.

It is an arithmetic number, because the mean of its divisors is an integer number (329688994).

Almost surely, 2^659377987 is an apocalyptic number.

659377987 is a deficient number, since it is larger than the sum of its proper divisors (1).

659377987 is an equidigital number, since it uses as much as digits as its factorization.

659377987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 61.

The square root of 659377987 is about 25678.3563921058. The cubic root of 659377987 is about 870.3851674545.

The spelling of 659377987 in words is "six hundred fifty-nine million, three hundred seventy-seven thousand, nine hundred eighty-seven".