781327093 has 2 divisors, whose sum is σ = 781327094. Its totient is φ = 781327092.

The previous prime is 781327091. The next prime is 781327109. The reversal of 781327093 is 390723187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564442564 + 216884529 = 23758^2 + 14727^2 .

It is a cyclic number.

It is not a de Polignac number, because 781327093 - 2¹ = 781327091 is a prime.

It is a super-2 number, since 2×781327093² = 1220944052511661298, which contains 22 as substring.

Together with 781327091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781327091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390663546 + 390663547.

It is an arithmetic number, because the mean of its divisors is an integer number (390663547).

Almost surely, 2^781327093 is an apocalyptic number.

It is an amenable number.

781327093 is a deficient number, since it is larger than the sum of its proper divisors (1).

781327093 is an equidigital number, since it uses as much as digits as its factorization.

781327093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 781327093 is about 27952.2287662362. The cubic root of 781327093 is about 921.0381683880.

The spelling of 781327093 in words is "seven hundred eighty-one million, three hundred twenty-seven thousand, ninety-three".