781979485 has 24 divisors (see below), whose sum is σ = 1149037920. Its totient is φ = 507989664.

The previous prime is 781979441. The next prime is 781979489. The reversal of 781979485 is 584979187.

It is not a de Polignac number, because 781979485 - 2⁷ = 781979357 is a prime.

It is a super-2 number, since 2×781979485² = 1222983829921730450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781979489) 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 23 ways as a sum of consecutive naturals, for example, 79339 + ... + 88648.

It is an arithmetic number, because the mean of its divisors is an integer number (47876580).

Almost surely, 2^781979485 is an apocalyptic number.

It is an amenable number.

781979485 is a deficient number, since it is larger than the sum of its proper divisors (367058435).

781979485 is a wasteful number, since it uses less digits than its factorization.

781979485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168025 (or 168018 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 58.

The square root of 781979485 is about 27963.8960983623. The cubic root of 781979485 is about 921.2944463606.

The spelling of 781979485 in words is "seven hundred eighty-one million, nine hundred seventy-nine thousand, four hundred eighty-five".