681474735 has 32 divisors (see below), whose sum is σ = 1241069760. Its totient is φ = 354585600.

The previous prime is 681474719. The next prime is 681474743. The reversal of 681474735 is 537474186.

It is not a de Polignac number, because 681474735 - 2⁴ = 681474719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56026 + ... + 67095.

It is an arithmetic number, because the mean of its divisors is an integer number (38783430).

Almost surely, 2^681474735 is an apocalyptic number.

681474735 is a deficient number, since it is larger than the sum of its proper divisors (559595025).

681474735 is a wasteful number, since it uses less digits than its factorization.

681474735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123176 (or 123170 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 681474735 is about 26105.0710590874. The cubic root of 681474735 is about 880.0011772539.

The spelling of 681474735 in words is "six hundred eighty-one million, four hundred seventy-four thousand, seven hundred thirty-five".