781671041 has 2 divisors, whose sum is σ = 781671042. Its totient is φ = 781671040.

The previous prime is 781671029. The next prime is 781671049. The reversal of 781671041 is 140176187.

781671041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650454016 + 131217025 = 25504^2 + 11455^2 .

It is a cyclic number.

It is not a de Polignac number, because 781671041 - 2²² = 777476737 is a prime.

It is a super-2 number, since 2×781671041² = 1222019232676047362, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 781670992 and 781671010.

It is not a weakly prime, because it can be changed into another prime (781671049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390835520 + 390835521.

It is an arithmetic number, because the mean of its divisors is an integer number (390835521).

Almost surely, 2^781671041 is an apocalyptic number.

It is an amenable number.

781671041 is a deficient number, since it is larger than the sum of its proper divisors (1).

781671041 is an equidigital number, since it uses as much as digits as its factorization.

781671041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 781671041 is about 27958.3805146149. The cubic root of 781671041 is about 921.1732986322.

The spelling of 781671041 in words is "seven hundred eighty-one million, six hundred seventy-one thousand, forty-one".