961787 has 4 divisors (see below), whose sum is σ = 977616. Its totient is φ = 945960.

The previous prime is 961783. The next prime is 961789. The reversal of 961787 is 787169.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787169 = 181 ⋅4349.

It is a cyclic number.

It is not a de Polignac number, because 961787 - 2² = 961783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 961787.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 961787.

It is not an unprimeable number, because it can be changed into a prime (961783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7823 + ... + 7944.

It is an arithmetic number, because the mean of its divisors is an integer number (244404).

2⁹⁶¹⁷⁸⁷ is an apocalyptic number.

961787 is a deficient number, since it is larger than the sum of its proper divisors (15829).

961787 is a wasteful number, since it uses less digits than its factorization.

961787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15828.

The product of its digits is 21168, while the sum is 38.

The square root of 961787 is about 980.7073977492. The cubic root of 961787 is about 98.7096550461.

The spelling of 961787 in words is "nine hundred sixty-one thousand, seven hundred eighty-seven".