961687 has 2 divisors, whose sum is σ = 961688. Its totient is φ = 961686.

The previous prime is 961679. The next prime is 961691. The reversal of 961687 is 786169.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961687 - 2³ = 961679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480843 + 480844.

It is an arithmetic number, because the mean of its divisors is an integer number (480844).

2⁹⁶¹⁶⁸⁷ is an apocalyptic number.

961687 is a deficient number, since it is larger than the sum of its proper divisors (1).

961687 is an equidigital number, since it uses as much as digits as its factorization.

961687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 961687 is about 980.6564128175. The cubic root of 961687 is about 98.7062338770.

The spelling of 961687 in words is "nine hundred sixty-one thousand, six hundred eighty-seven".