659951 has 2 divisors, whose sum is σ = 659952. Its totient is φ = 659950.

The previous prime is 659947. The next prime is 659963. The reversal of 659951 is 159956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 659951 - 2² = 659947 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329975 + 329976.

It is an arithmetic number, because the mean of its divisors is an integer number (329976).

2⁶⁵⁹⁹⁵¹ is an apocalyptic number.

659951 is a deficient number, since it is larger than the sum of its proper divisors (1).

659951 is an equidigital number, since it uses as much as digits as its factorization.

659951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 35.

The square root of 659951 is about 812.3736824885. The cubic root of 659951 is about 87.0637221978.

The spelling of 659951 in words is "six hundred fifty-nine thousand, nine hundred fifty-one".