787961 has 4 divisors (see below), whose sum is σ = 795300. Its totient is φ = 780624.

The previous prime is 787939. The next prime is 787973. The reversal of 787961 is 169787.

It is a happy number.

787961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169787 = 31 ⋅5477.

It can be written as a sum of positive squares in 2 ways, for example, as 712336 + 75625 = 844^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 787961 - 2¹⁰ = 786937 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 787961.

It is not an unprimeable number, because it can be changed into a prime (787981) 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, 3506 + ... + 3723.

It is an arithmetic number, because the mean of its divisors is an integer number (198825).

2⁷⁸⁷⁹⁶¹ is an apocalyptic number.

It is an amenable number.

787961 is a deficient number, since it is larger than the sum of its proper divisors (7339).

787961 is a wasteful number, since it uses less digits than its factorization.

787961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338.

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

The square root of 787961 is about 887.6716735370. The cubic root of 787961 is about 92.3637536412.

The spelling of 787961 in words is "seven hundred eighty-seven thousand, nine hundred sixty-one".