781046427 has 12 divisors (see below), whose sum is σ = 1211419176. Its totient is φ = 446312160.

The previous prime is 781046401. The next prime is 781046429. The reversal of 781046427 is 724640187.

It is not a de Polignac number, because 781046427 - 2²⁴ = 764269211 is a prime.

It is a super-2 number, since 2×781046427² = 1220067042258932658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781046429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2656474 + ... + 2656767.

It is an arithmetic number, because the mean of its divisors is an integer number (100951598).

Almost surely, 2^781046427 is an apocalyptic number.

781046427 is a deficient number, since it is larger than the sum of its proper divisors (430372749).

781046427 is a wasteful number, since it uses less digits than its factorization.

781046427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313258 (or 5313251 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 781046427 is about 27947.2078569577. The cubic root of 781046427 is about 920.9278709807.

The spelling of 781046427 in words is "seven hundred eighty-one million, forty-six thousand, four hundred twenty-seven".