681547124 has 12 divisors (see below), whose sum is σ = 1192912644. Its totient is φ = 340714944.

The previous prime is 681547103. The next prime is 681547169. The reversal of 681547124 is 421745186.

It can be written as a sum of positive squares in 2 ways, for example, as 437562724 + 243984400 = 20918^2 + 15620^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21314 + ... + 42630.

It is an arithmetic number, because the mean of its divisors is an integer number (99409387).

Almost surely, 2^681547124 is an apocalyptic number.

It is an amenable number.

681547124 is a deficient number, since it is larger than the sum of its proper divisors (511365520).

681547124 is a wasteful number, since it uses less digits than its factorization.

681547124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29314 (or 29312 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 681547124 is about 26106.4575153352. The cubic root of 681547124 is about 880.0323352443.

The spelling of 681547124 in words is "six hundred eighty-one million, five hundred forty-seven thousand, one hundred twenty-four".