787869 has 6 divisors (see below), whose sum is σ = 1138046. Its totient is φ = 525240.

The previous prime is 787837. The next prime is 787879. The reversal of 787869 is 968787.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 131769 = 810^2 + 363^2 .

It is not a de Polignac number, because 787869 - 2⁵ = 787837 is a prime.

It is a super-2 number, since 2×787869² = 1241475122322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43762 + ... + 43779.

2⁷⁸⁷⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

787869 is a deficient number, since it is larger than the sum of its proper divisors (350177).

787869 is a wasteful number, since it uses less digits than its factorization.

787869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87547 (or 87544 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 787869 is about 887.6198510624. The cubic root of 787869 is about 92.3601587949.

The spelling of 787869 in words is "seven hundred eighty-seven thousand, eight hundred sixty-nine".