781327 has 2 divisors, whose sum is σ = 781328. Its totient is φ = 781326.

The previous prime is 781321. The next prime is 781351. The reversal of 781327 is 723187.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 781327 - 2⁷ = 781199 is a prime.

It is a super-2 number, since 2×781327² = 1220943761858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781295 and 781304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390663 + 390664.

It is an arithmetic number, because the mean of its divisors is an integer number (390664).

2⁷⁸¹³²⁷ is an apocalyptic number.

781327 is a deficient number, since it is larger than the sum of its proper divisors (1).

781327 is an equidigital number, since it uses as much as digits as its factorization.

781327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 28.

The square root of 781327 is about 883.9270331877. The cubic root of 781327 is about 92.1038131845.

The spelling of 781327 in words is "seven hundred eighty-one thousand, three hundred twenty-seven".