787823561 has 8 divisors (see below), whose sum is σ = 904235904. Its totient is φ = 672377760.

The previous prime is 787823557. The next prime is 787823563. The reversal of 787823561 is 165328787.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 787823561 - 2² = 787823557 is a prime.

It is a super-3 number, since 3×787823561³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787823563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239885 + ... + 243146.

It is an arithmetic number, because the mean of its divisors is an integer number (113029488).

Almost surely, 2^787823561 is an apocalyptic number.

It is an amenable number.

787823561 is a deficient number, since it is larger than the sum of its proper divisors (116412343).

787823561 is a wasteful number, since it uses less digits than its factorization.

787823561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483271.

The product of its digits is 564480, while the sum is 47.

The square root of 787823561 is about 28068.1948297357. The cubic root of 787823561 is about 923.5838318923.

The spelling of 787823561 in words is "seven hundred eighty-seven million, eight hundred twenty-three thousand, five hundred sixty-one".