787331 has 2 divisors, whose sum is σ = 787332. Its totient is φ = 787330.

The previous prime is 787309. The next prime is 787333. The reversal of 787331 is 133787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 787331 - 2¹⁰ = 786307 is a prime.

It is a super-2 number, since 2×787331² = 1239780207122, which contains 22 as substring.

Together with 787333, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 787294 and 787303.

It is not a weakly prime, because it can be changed into another prime (787333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393665 + 393666.

It is an arithmetic number, because the mean of its divisors is an integer number (393666).

2⁷⁸⁷³³¹ is an apocalyptic number.

787331 is a deficient number, since it is larger than the sum of its proper divisors (1).

787331 is an equidigital number, since it uses as much as digits as its factorization.

787331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 787331 is about 887.3167416430. The cubic root of 787331 is about 92.3391311536.

The spelling of 787331 in words is "seven hundred eighty-seven thousand, three hundred thirty-one".